约翰·亚当斯和脚本作家彼得·塞拉斯再度合作，推出歌剧《原子弹博士》，讲述奥本海默研发原子弹的故事，男中音芬雷演唱主角奥本海默。该制作获得年度格莱美奖的表彰。

大都会歌剧院高清转播系列，瓦格纳的四联剧《尼伯龙人的指环》，前夜剧《莱茵的黄金》在2011年10月8日首度向全美直播，此次直播的录像在2013年11月底在上海大剧院以及上海艺术人文频道进行剧场放映和电视播出。

The plot revolves around a magic ring that grants the power to rule the world, forged by the Nibelung dwarf Alberich from gold he stole from the Rhine maidens in the river Rhine. The Ring itself as described by Wagner is a Rune-magic taufr ("tine", or "talisman") intended to rule the feminine multiplicative power by a fearful magical act termed as 'denial of love' ("Liebesverzicht"). With the assistance of the god Loge, Wotan – the chief of the gods – steals the ring from Alberich, but is forced to hand it over to the giants, Fafner and Fasolt in payment for building the home of the gods, Valhalla, or they will take Freia, who provides the gods with the golden apples that keep them young. Wotan's schemes to regain the ring, spanning generations, drive much of the action in the story. His grandson, the mortal Siegfried, wins the ring by slaying Fafner (who slew Fasolt for the ring) – as Wotan intended – but is eventually betrayed and slain as a result of the intrigues of Alberich's son Hagen, who wants the ring for himself. Finally, the Valkyrie Brünnhilde – Siegfried's lover and Wotan's daughter who lost her immortality for defying her father in an attempt to save Siegfried's father Sigmund – returns the ring to the Rhine maidens as she commits suicide on Siegfried's funeral pyre. Hagen is drowned as he attempts to recover the ring. In the process, the gods and Valhalla are destroyed.
Details of the storylines can be found in the articles on each music drama.
Wagner created the story of the Ring by fusing elements from many German and Scandinavian myths and folk tales. The Old Norse Edda supplied much of the material for Das Rheingold, while Die Walküre was largely based on the Völsunga saga. Siegfried contains elements from the Eddur, the Völsunga saga and Thidrekssaga. The final Götterdämmerung, draws from the 12th-century German poem, the Nibelungenlied, which appears to have been the original inspiration for the Ring.
The Ring has been the subject of myriad interpretations. For example, George Bernard Shaw, in The Perfect Wagnerite, argues for a view of The Ring as an essentially socialist critique of industrial society and its abuses. Robert Donington in Wagner's Ring And Its Symbols interprets it in terms of Jungian psychology, as an account of the development of unconscious archetypes in the mind, leading towards individuation.

Prologue
The three Norns, daughters of Erda, gather beside Brünnhilde's rock, weaving the rope of Destiny. They sing of the past and the present, and of the future when Wotan will set fire to Valhalla to signal the end of the gods. Without warning, their rope breaks. Lamenting the loss of their wisdom, the Norns disappear.
As day breaks, Siegfried and Brünnhilde emerge from their cave, high on a mountaintop surrounded by magic fire. Brünnhilde sends Siegfried off to new adventures, urging him to keep their love in mind. As a pledge of fidelity, Siegfried gives her the ring of power that he took from Fafner's hoard. Bearing Brünnhilde's shield and mounting her horse Grane, Siegfried rides away as an orchestral interlude (Siegfried's Journey to the Rhine) starts.
Act 1
The act begins in the Hall of the Gibichungs, a population dwelling by the Rhine. Gunther, lord of the Gibichungs, sits enthroned. His half-brother and chief minister, Hagen, advises him to find a wife for himself and a husband for their sister Gutrune. He suggests Brünnhilde for Gunther's wife, and Siegfried for Gutrune's husband. He reminds Gutrune that he has given her a potion that she can use to make Siegfried forget Brünnhilde and fall in love with Gutrune; under its influence, Siegfried will win Brünnhilde for Gunther. Gunther and Gutrune agree enthusiastically with this plan.
Siegfried appears at Gibichung Hall, seeking to meet Gunther. Gunther extends his hospitality to the hero, and Gutrune offers him the love potion. Unaware of the deception, Siegfried toasts Brünnhilde and their love. Drinking the potion, he loses his memory of Brünnhilde and falls in love with Gutrune instead. In his drugged state, Siegfried offers to win a wife for Gunther, who tells him about Brünnhilde and the magic fire which only a fearless person can cross. They swear blood-brotherhood (Hagen holds the drinking horn in which they mix their blood, but he does not join in the oath) and leave for Brünnhilde's rock. Hagen, left on guard duty, gloats that his so-called masters are unwittingly bringing the ring to him (Monologue: Hagen's watch).
Meanwhile, Brünnhilde is visited by her Valkyrie sister Waltraute, who tells her that Wotan returned from his wanderings with his spear shattered. Wotan is dismayed at losing his spear, as it has all the treaties and bargains he has made—everything that gives him power—carved into its shaft. Wotan ordered branches of the World tree, to be piled around Valhalla; sent his magic ravens to spy on the world and bring him news; and currently waits in Valhalla for the end. Waltraute begs Brünnhilde to return the ring to the Rhinemaidens, since the ring's curse is now affecting their father, Wotan. However, Brünnhilde refuses to relinquish Siegfried's token of love, and Waltraute rides away in despair.
Siegfried arrives, disguised as Gunther by using the Tarnhelm, and claims Brünnhilde as his wife. Though Brünnhilde resists violently, Siegfried overpowers her, snatching the ring from her hand and placing it on his own.
Act 2
Hagen, waiting by the bank of the Rhine, is visited in his semi-waking sleep (sitting up, eyes open, but motionless) by his father, Alberich. On Alberich's urging, he swears to kill Siegfried and acquire the ring. Alberich exits as dawn breaks. Siegfried arrives via Tarnhelm-magic, having resumed his natural form and left Brünnhilde on the boat with Gunther. Hagen summons the Gibichung vassals to welcome Gunther and his bride. He does this by sounding the war-alarm. The vassals are surprised to learn that the occasion is not battle, but their master's wedding and party.
Gunther leads in a downcast Brünnhilde, who is astonished to see Siegfried. Noticing the ring on Siegfried's hand, she realizes she has been betrayed—that the man who conquered her was not Gunther, but Siegfried in disguise. She denounces Siegfried in front of Gunther's vassals and accuses Siegfried of having seduced her himself. Siegfried, who does not remember ever having been Brünhilde's lover, swears on Hagen's spear that her accusations are false. Brünnhilde seizes the tip of the spear and swears that they are true. Once again Hagen supervises silently as others take oaths to his advantage. But this time, since the oath is sworn on a weapon, the understanding is that if the oath is proven false, the weapon's owner should avenge it by killing the perjurer with that weapon. Siegfried then leads Gutrune and the bystanders off to the wedding feast, leaving Brünnhilde, Hagen, and Gunther alone by the shore. Deeply shamed by Brünnhilde's outburst, Gunther agrees to Hagen's suggestion that Siegfried must be killed in order for Gunther to regain his standing. Brünnhilde, seeking revenge for Siegfried's manifest treachery, joins the plot and tells Hagen that Siegfried would be vulnerable to a stab in the back. Hagen and Gunther decide to lure Siegfried on a hunting-trip and murder him. They sing a trio in which Brünnhilde and Gunther vow in the name of Wotan, "guardian of oaths", to kill Siegfried, while Hagen repeats his pledge to Alberich: to acquire the ring and rule the world through its power.
Act 3
In the woods by the bank of the Rhine, the Rhinemaidens mourn the lost Rhine gold. Siegfried happens by, separated from the hunting party. The Rhinemaidens urge him to return the ring and avoid its curse, but he laughs at them and says he prefers to die rather than bargain for his life. They swim away, predicting that Siegfried will die and that his heir, a lady, will treat them more fairly.
Siegfried rejoins the hunters, who include Gunther and Hagen. While resting, he tells them about the adventures of his youth. Hagen gives him another potion, which restores his memory, and he tells of discovering the sleeping Brünnhilde and awakening her with a kiss. Hagen stabs him in the back with his spear. The others look on in horror, and Hagen explains in three words ("Meineid rächt' ich!" – "I have avenged perjury!") that since Siegfried admitted loving Brünnhilde, the oath he swore on Hagen's spear was obviously false, therefore it was Hagen's duty to kill him with it. Hagen calmly walks away into the wood. Siegfried recollects his awakening of Brünnhilde and dies. His body is carried away in a solemn funeral procession (Siegfried's funeral march) that forms the interlude as the scene is changed and recapitulates many of the themes associated with Siegfried and the Wälsungs.
Back in the Gibichung Hall, Gutrune awaits Siegfried's return. Hagen arrives ahead of the funeral party. Gutrune is devastated when Siegfried's corpse is brought in. Gunther blames Siegfried's death on Hagen, who replies that Siegfried had incurred the penalty of his false oath, and further, claims the ring on Siegfried's finger by right of conquest. When Gunther objects, Hagen appeals to the vassals to support his claim. Gunther draws his sword but Hagen attacks and easily kills him. However, as Hagen moves to take the ring, Siegfried's hand rises threateningly. Hagen recoils in fear.
Brünnhilde makes her entrance and issues orders for a huge funeral pyre to be assembled by the river (the start of the Immolation Scene). She takes the ring and tells the Rhinemaidens to claim it from her ashes, once fire has cleansed it of its curse. Lighting the pyre with a firebrand, she sends Wotan's ravens home with "anxiously longed-for tidings", and to fly by the magic fire for Loge to fulfill his task. After an apostrophe to the dead hero, Brünnhilde mounts her horse Grane and rides into the flames.
A sequence of leitmotifs portray the fire flaring up, and the hall of the Gibichungs catching fire and collapsing. The Rhine overflows its banks, quenching the fire, and the Rhinemaidens swim in to claim the ring. Hagen tries to stop them but they drag him into the depths and drown him. As they celebrate the return of the ring and its gold to the river, a red glow is seen in the sky. As the Gibichungs watch, the interior of Valhalla is finally seen, with gods and heroes visible as described by Waltraute in Act 1. Flames flare up in the Hall of the Gods, hiding it and them from sight completely. As the gods are consumed in the flames, the curtain falls to the sound of the Erlösungsmotif—the redemption leitmotif.

Act 1
Scene 1
A cave in rocks in the forest. An orchestral introduction includes references to leitmotifs including themes relating to the original hoard plundered by the Nibelung Alberich, and one in B-flat minor associated with the Nibelungs themselves. As the curtain rises, Alberich's brother, the dwarf Mime, is forging a sword. Mime is plotting to obtain the ring of power originally created by his brother Alberich. He has raised the human boy Siegfried as a foster child, to kill Fafner, who obtained the ring and other treasures in the opera Das Rheingold and has since transformed himself from a giant to a dragon. Mime needs a sword for Siegfried to use, but the youth has contemptuously broken every sword Mime has made. Siegfried returns from his wanderings in the forest with a wild bear in tow, and immediately breaks the new sword. After a whining speech by Mime about ingratitude, and how Mime has brought him up from a mewling infant ("Als zullendes Kind"), Siegfried senses why he keeps coming back to Mime although he despises him: he wants to know his parentage. Mime is forced to explain how he took in Siegfried's mother, Sieglinde, who then died giving birth to Siegfried. He shows Siegfried the broken pieces of the sword Nothung, which Mime had obtained from her. Siegfried orders him to reforge the sword; Mime, however, is unable to accomplish this. Siegfried departs, leaving Mime in despair.
Scene 2
An old man (Wotan in disguise) arrives at the door and introduces himself as the Wanderer. In return for the hospitality due a guest, he wagers his head on answering any three questions of Mime. The dwarf asks the Wanderer to name the races that live beneath the ground, on the earth, and in the skies. These are the Nibelung, the Giants, and the Gods, as the Wanderer answers correctly. The Wanderer then induces Mime to wager his own head on three further riddles: the race most beloved of Wotan, but most harshly treated; the name of the sword that can destroy Fafner; and the person who can repair the sword. Mime answers the first two questions: the Wälsungs (Siegmund and Sieglinde whose tale is told in the opera Die Walküre) and Nothung. However, he cannot answer the last. Wotan spares Mime, telling him that only "he who does not know fear" can reforge Nothung, and leaves Mime's head forfeit to that person.
Scene 3
Mime despairs as he imagines the ferocity of the dragon Fafner, while "the orchestra paints a dazzling picture of flickering lights and roaring flames". Siegfried returns and is annoyed by Mime's lack of progress. Mime realizes that Siegfried is "the one who does not know fear" and that unless he can instill fear in him, Siegfried will kill him as the Wanderer foretold. He tells Siegfried that fear is an essential craft; Siegfried is eager to learn it, and Mime promises to teach him by taking him to Fafner. Since Mime was unable to forge Nothung, Siegfried decides to do it himself. He succeeds by shredding the metal, melting it, and casting it anew. In the meantime, Mime brews a poisoned drink to offer Siegfried after the youth has defeated the dragon. After he finishes forging the sword, Siegfried demonstrates its strength by chopping the anvil in half with it.
Act 2
Scene 1
Deep in the forest. The Wanderer arrives at the entrance to Fafner's cave, where Alberich is keeping vigil. The two enemies recognize each other. Alberich boasts of his plans to regain the ring and rule the world. Wotan states that he does not intend to interfere, only to observe. He even offers to awaken the dragon so that Alberich can bargain with him. Alberich warns the dragon that a hero is coming to kill him, and offers to prevent the fight in exchange for the ring. Fafner dismisses the threat, declines Alberich's offer, and returns to sleep. Wotan leaves and Alberich withdraws, muttering threats.
Scene 2
At daybreak, Siegfried and Mime arrive. After assuring Siegfried that the dragon will teach him what fear is, Mime withdraws. As Siegfried waits for the dragon to appear, he hears a woodbird singing. He attempts to mimic the bird's song using a reed pipe, but is unsuccessful. He then plays a tune on his horn, which brings Fafner out of his cave. After a short exchange, they fight; Siegfried stabs Fafner in the heart with Nothung. In his last moments, Fafner learns Siegfried's name, and tells him to beware of treachery. When Siegfried withdraws his sword from Fafner's body, his hands are burned by the dragon's blood and he puts his finger in his mouth. On tasting the blood, he finds that he can understand the woodbird's song. Following its instructions, he takes the ring and the magic helmet Tarnhelm from Fafner's hoard.
Scene 3
Outside the cave, Alberich and Mime quarrel over the treasure. Alberich hides as Siegfried comes out of the cave. Siegfried complains to Mime that he has still not learned the meaning of fear. Mime offers him the poisoned drink; however, the magic power of the dragon's blood allows Siegfried to read Mime's treacherous thoughts, and he stabs him to death. He throws Mime's body into the treasure cave and places Fafner's body in the cave entrance to block it. The woodbird now sings of a woman sleeping on a rock surrounded by magic fire. Siegfried, wondering if he can learn fear from this woman, follows the bird towards the rock.
Act 3
Scene 1
At the foot of Brünnhilde's rock. The Wanderer summons Erda, the earth goddess. Erda, appearing confused, is unable to offer any advice. Wotan informs her that he no longer fears the end of the gods; indeed, it is his desire. His heritage will be left to Siegfried the Wälsung, and Brünnhilde (Erda's and Wotan's child), who will "work the deed that redeems the World." Dismissed, Erda sinks back into the earth.
Scene 2
Siegfried arrives, and the Wanderer questions the youth. Siegfried, who does not recognize his grandfather, answers insolently and starts down the path toward Brünnhilde's rock. The Wanderer blocks his path, but Siegfried mocks him, laughing at his floppy hat and his missing eye, and breaks his spear (the symbol of Wotan's authority) with a blow from Nothung. Wotan calmly gathers up the pieces and vanishes.
Scene 3
Siegfried passes through the ring of fire, emerging on Brünnhilde's rock. At first, he thinks the sleeping armored figure is a man. However, when he removes the armor, he finds a woman beneath. At the sight of the first woman he has ever seen, Siegfried at last experiences fear. In desperation, he kisses Brünnhilde, waking her from her magic sleep. Hesitant at first, Brünnhilde is won over by Siegfried's love, and renounces the world of the gods. Together, they hail "light-bringing love, and laughing death."

Scene 1
At the bottom of the Rhine, the three Rhinemaidens, Woglinde, Wellgunde, and Floßhilde, play together. Alberich, a Nibelung dwarf, appears from a deep chasm and tries to woo them. The maidens mock his advances and he grows angry – he chases them, but they elude, tease and humiliate him. A sudden ray of sunshine pierces the depths, to reveal the Rhine gold. The maidens sing a hymn of praise to the gold, and Alberich asks what it is. They explain that the gold, which their father has ordered them to guard, can be made into a magic ring which gives power to rule the world, if its bearer first renounces love. The maidens think they have nothing to fear from the lustful dwarf, but Alberich, embittered by their mockery, curses love, seizes the gold and returns to his chasm, leaving them screaming in dismay.
Scene 2
Wotan, ruler of the gods, is asleep on a mountaintop, with a magnificent castle behind him. His wife, Fricka, wakes Wotan, who salutes their new home. Fricka reminds him of his promise to the giants Fasolt and Fafner, who built the castle, that he would give them Fricka's sister Freia, the goddess of youth and beauty, as payment. Fricka is worried for her sister, but Wotan is confident that Loge, the demigod of fire, will find an alternative payment.
Freia enters in a panic, followed by Fasolt and Fafner. Fasolt demands that Freia be given up. He points out that Wotan's authority is sustained by the treaties carved into his spear, including his contract with the giants, which Wotan therefore cannot violate. Donner, god of thunder, and Froh, god of sunshine, arrive to defend Freia, but Wotan cannot permit the use of force to break the agreement. Hoping that Loge will arrive with the alternative payment he had promised, Wotan tries to stall.
When Loge arrives, his initial report is discouraging: nothing is more valuable to men than love, so, there is apparently no possible alternative payment besides Freia. Loge was able to find only one instance where someone willingly gave up love for something else: Alberich the Nibelung had renounced love, stolen the Rhine gold and made a powerful magic ring out of it. A discussion of the ring and its powers ensues, to which the giants listen carefully, and everyone finds good reasons for wanting to own it. Fafner makes a counter-offer: the giants will accept the Nibelung's treasure in payment, instead of Freia. When Wotan tries to haggle, the giants depart, taking Freia with them as hostage and promising to keep her forever unless the gods ransom her by obtaining, and giving them, the Nibelung's gold, by the end of the day.
Freia's golden apples had kept the gods eternally young, but in her absence they begin to age and weaken. In order to redeem Freia, Wotan resolves to travel with Loge to Alberich's subterranean kingdom to obtain the gold.
Scene 3
In Nibelheim, Alberich has enslaved the rest of the Nibelung dwarves with the power of the ring. He has forced his brother Mime, a skillful smith, to create a magic helmet, the Tarnhelm. Alberich demonstrates the Tarnhelm's power by making himself invisible, the better to torment his subjects.
Wotan and Loge arrive and happen upon Mime, who tells them of the misery under Alberich's rule. Alberich returns, driving his slaves to pile up a huge mound of gold. He boasts to the visitors about his plans to conquer the world using the power of the ring. Loge asks how he can protect himself against a thief while he sleeps. Alberich replies the Tarnhelm will hide him, by allowing him to turn invisible or change his form. Loge expresses doubt and requests a demonstration. Alberich complies by transforming himself into a giant snake; Loge acts suitably impressed, and then asks whether Alberich can also reduce his size, which would be very useful for hiding. Alberich transforms himself into a toad. Wotan and Loge seize him and drag him up to the surface.
Scene 4
Back on the mountaintop, Wotan and Loge force Alberich to exchange his wealth for his freedom. He summons the Nibelungen, who bring up the hoard of gold. He then asks for the return of the Tarnhelm, but Loge says that it is part of his ransom. Alberich still hopes he can keep the ring, but Wotan demands it, and when Alberich refuses, Wotan tears it from Alberich's hand and puts it on his own finger. Crushed by his loss, Alberich lays a curse on the ring: until it should return to him, whoever possesses it will live in anxiety, and will eventually be robbed of it and killed.
The gods reconvene. Fasolt and Fafner return with Freia. Fasolt, reluctant to release her, insists that the gold be piled high enough to hide her from view. Wotan is forced to relinquish the Tarnhelm, to help cover Freia completely. However, Fasolt spots a remaining crack in the gold, through which one of Freia's eyes can be seen. Loge says that there is no more gold, but Fafner, who has noticed the ring on Wotan's finger, demands that Wotan add it to the pile, to block the crack. Loge protests that the ring belongs to the Rheinmaidens, and Wotan angrily declares that he intends to keep it for his own. As the giants seize Freia and start to leave, Erda, the earth goddess, appears and warns Wotan of impending doom, urging him to give up the cursed ring. Troubled, Wotan calls the giants back and surrenders the ring. The giants release Freia and begin dividing the treasure, but they quarrel over the ring itself. Fafner clubs Fasolt to death. Wotan, horrified, realizes that Alberich's curse has terrible power.
Donner summons a thunderstorm to clear the air, after which Froh creates a rainbow bridge that stretches to the gate of the castle. Wotan leads the gods across the bridge to the castle, which he names Valhalla. Loge does not follow; he says in an aside that he is tempted to destroy the treacherous gods by fire – he will think it over. Far below, the Rhine maidens mourn the loss of their gold, and condemn the gods as false and cowardly.

Backstory: The Egyptians have captured and enslaved Aida, an Ethiopian princess. An Egyptian military commander, Radamès, struggles to choose between his love for her and his loyalty to the King of Egypt. To complicate the story further, the King's daughter Amneris is in love with Radamès, although he does not return her feelings.
Act 1
Scene 1: A hall in the King's palace; through the rear gate the pyramids and temples of Memphis are visible
Ramfis, the high priest of Egypt, tells Radamès, the young warrior, that war with the Ethiopians seems inevitable, and Radamès hopes that he will be chosen as the Egyptian commander (Ramfis, Radamès: "Sì, corre voce l'Etiope ardisca" / Yes, it is rumored that Ethiopia dares once again to threaten our power).
Radamès dreams both of gaining victory on the battlefield and of Aida, an Ethiopian slave, with whom he is secretly in love (Radamès: "Se quel guerrier io fossi! ... Celeste Aida" / Heavenly Aida). Aida, who is also secretly in love with Radamès, is the captured daughter of the Ethiopian King Amonasro, but her Egyptian captors are unaware of her true identity. Her father has invaded Egypt to deliver her from servitude.
Amneris, the daughter of the Egyptian King, enters the hall. She too loves Radamès, but fears that his heart belongs to someone else (Radamès, Amneris: "Quale insolita gioia nel tuo sguardo" / In your looks I trace a joy unwonted).
Aida appears and, when Radamès sees her, Amneris notices that he looks disturbed. She suspects that Aida could be her rival, but is able to hide her jealousy and approach Aida (Amneris, Aida, Radamès: "Vieni, o diletta, appressati" / Come, O delight, come closer).
The King enters, along with the High Priest, Ramfis, and the whole palace court. A messenger announces that the Ethiopians, led by King Amonasro, are marching towards Thebes. The King declares war and proclaims that Radamès is the man chosen by the goddess Isis to be the leader of the army (The King, Messenger, Radamès, Aida, Amneris, Ramfis, chorus: "Alta cagion v'aduna .. Guerra, guerra, guerra!" / Oh fate o'er Egypt looming .. War, war, war!). Upon receiving this mandate from the King, Radamès proceeds to the temple of Vulcan to take up the sacred arms (The King, Radamès, Aida, Amneris, chorus: "Su! del Nilo al sacro lido" .. (reprise) "Guerra, guerra guerra!" / On! Of Nilus' sacred river, guard the shores .. (reprise) War, war, war!).
Alone in the hall, Aida feels torn between her love for her father, her country, and Radamès (Aida: "Ritorna vincitor" / Return a conqueror).
Scene 2: Inside the Temple of Vulcan
Solemn ceremonies and dances by the priestesses take place (High Priestess, chorus, Radamès: "Possente Ftha ... Tu che dal nulla" / O mighty Ptah). This is followed by the installation of Radamès to the office of commander-in-chief (High Priestess, chorus, Ramfis, Radamès: "Immenso Ftha .. Mortal, diletto ai Numi" / O mighty one, guard and protect!). All present in the temple pray fervently for the victory of Egypt and protection for their warriors ("Nume, custode e vindice"/ Hear us, O guardian deity).
Act 2
Scene 1: The chamber of Amneris
Dances and music to celebrate Radamès' victory take place (Chorus, Amneris: "Chi mai fra gli inni e i plausi" / Our songs his glory praising). However, Amneris is still in doubt about Radamès' love and wonders whether Aida is in love with him. She tries to forget her doubt, entertaining her worried heart with the dance of Moorish slaves (Chorus, Amneris: "Vieni: sul crin ti piovano" / Come bind your flowing tresses).
When Aida enters the chamber, Amneris asks everyone to leave. By falsely telling Aida that Radamès has died in the battle, she tricks her into professing her love for him. In grief, and shocked by the news, Aida confesses that her heart belongs to Radamès eternally (Amneris, Aida: "Fu la sorte dell'armi a' tuoi funesta" / The battle's outcome was cruel for your people).
This confession fires Amneris with rage, and she plans on taking revenge on Aida. Ignoring Aida's pleadings (Amneris, Aida, chorus: "Su! del Nilo al sacro lido" / Up! at the sacred shores of the Nile), Amneris leaves her alone in the chamber.
Scene 2: The grand gate of the city of Thebes
Radamès returns victorious and the troops march into the city (Chorus, Ramfis: "Gloria all'Egitto, ad Iside" / Glory to Egypt, [and] to Isis!).
The Egyptian king decrees that on this day the triumphant Radamès may have anything he wishes. The Ethiopian captives are led onstage in chains, Amonasro among them. Aida immediately rushes to her father, who whispers to her to conceal his true identity as King of Ethiopia from the Egyptians. Amonasro deceptively proclaims to the Egyptians that the Ethiopian king (referring to himself) has been slain in battle. Aida, Amonasro, and the captured Ethiopians plead with the Egyptian King for mercy, but Ramfis and the Egyptian priests call for their death (Aida, Amneris, Radamès, The King, Amonasro, chorus: "Che veggo! .. Egli? .. Mio padre! .. Anch'io pugnai .. Struggi, o Re, queste ciurme feroci" / What do I see?.. Is it he? My father? .. Destroy, O King, these ferocious creatures).
Claiming the reward promised by the King of Egypt, Radamès pleads with him to spare the lives of the prisoners and to set them free. The King grants Radamès' wish, and declares that he (Radamès) will be his (the King's) successor and will marry the King's daughter (Amneris). (Aida, Amneris, Radamès, Ramfis, The King, Amonasro, chorus: "O Re: pei sacri Numi! .. Gloria all'Egitto" / O King, by the sacred gods ... Glory to Egypt!). At Ramfis' suggestion to the King, Aida and Amonasro remain as hostages to ensure that the Ethiopians do not avenge their defeat.
Act 3
On the banks of the Nile, near the Temple of Isis
Prayers are said (Chorus, High Priestess, Ramfis, Amneris: "O tu che sei d'Osiride" / O thou who to Osiris art) on the eve of Amneris and Radamès' wedding in the Temple of Isis. Outside, Aida waits to meet with Radamès as they had planned (Aida: "Qui Radamès verra .. O patria mia" / Oh, my dear country!).
Amonasro appears and orders Aida to find out the location of the Egyptian army from Radamès. Aida, torn between her love for Radamès and her loyalty to her native land and to her father, reluctantly agrees. (Aida, Amonasro: "Ciel, mio padre! .. Rivedrai le foreste imbalsamate" / Once again shalt thou gaze). When Radamès arrives, Amonasro hides behind a rock and listens to their conversation.
Radamès affirms that he will marry Aida ("Pur ti riveggo, mia dolce Aida .. Nel fiero anelito"; "Fuggiam gli ardori inospiti .. Là, tra foreste vergini" / I see you again, my sweet Aida!), and Aida convinces him to flee to the desert with her.
In order to make their escape easier, Radamès proposes that they use a safe route without any fear of discovery and reveals the location where his army has chosen to attack. Upon hearing this, Amonasro comes out of hiding and reveals his identity. Radamès realizes, to his extreme dismay, that he has unwittingly revealed a crucial military secret to the enemy. At the same time, Amneris and Ramfis leave the temple and, seeing Radamès in conference with the enemy, call for the imperial guards. Amonasro draws a dagger, intending to kill Amneris and Ramfis before the guards can hear them, but Radamès disarms him, quickly orders him to flee with Aida, and surrenders himself to the imperial guards as Aida and Amonasro run off. The guards arrest him as a traitor.
Act 4
Scene 1: A hall in the Temple of Justice. To one side is the door leading to Radamès' prison cell
Amneris desires to save Radamès ("L'aborrita rivale a me sfuggia" / My hated rival has escaped me). She calls for the guard to bring him to her.
She asks Radamès to deny the accusations, but Radamès, who does not wish to live without Aida, refuses. He is relieved to know Aida is still alive and hopes she has reached her own country (Amneris, Radamès: "Già i Sacerdoti adunansi" / Already the priests are assembling).
Offstage, Ramfis recites the charges against Radamès and calls on him to defend himself, but he stands mute, and is condemned to death as a traitor. Amneris, who remains onstage, protests that he Radamès is innocent, and pleads with the priests to show mercy. The priests sentence him to be buried alive; Amneris weeps and curses the priests as he is taken away (Judgment scene, Amneris, Ramfis, and chorus: "Ahimè! .. morir mi sento .. Radamès, e deciso il tuo fato" / Alas .. I feel death .. Radamès, your fate is decided).
Scene 2: The lower portion of the stage shows the vault in the Temple of Vulcan; the upper portion represents the temple itself
Radamès has been taken into the lower floor of the temple and sealed up in a dark vault, where he thinks that he is alone. As he hopes that Aida is in a safer place, he hears a sigh and then sees Aida. She has hidden herself in the vault in order to die with Radamès (Radamès and Aida: "La fatal pietra sovra me si chiuse." / The fatal stone now closes over me). They accept their terrible fate (Radamès: "Morir! Si pura e bella" / To die! So pure and lovely!) and bid farewell to Earth and its sorrows. Above the vault in the temple of Vulcan, Amneris weeps and prays to the goddess Isis. In the vault below, Aida dies in Radamès' arms as the priests, offstage, pray to the god Ftha. (Chorus, Aida, Radamès, Amneris: "Immenso Ftha" / Almighty Ptah).