The staff tries to deal with physical and emotional trauma in the wake of the deadly rampage.

凯特（凯乐·利 Chyler Leigh 饰）的父亲在一场意外中死去，凯特始终觉得这一切都是一场阴谋。为了查明父亲死亡的真相，凯特成为了一名刑警。然而，凯特有一个坏毛病，她是一个驾驶车辆非常狂野的暴力司机，因为这个毛病，凯特屡屡闯祸，被领导接二连三的降级，最终沦为了小小的街头巡查。
一次偶然中，凯特结识了一位名叫里昂（雅基·伊多 Jacky Ido 饰）的黑人出租车司机，里昂身为非法移民，每天都要面对被驱逐出境的威胁。凯特看中了里昂的车技，决定和他联手，里昂替她开车，她则可以帮助里昂解决他的户籍问题。这看上去八竿子打不到一起去的两人配合起来却意外的天衣无缝。

本次联动总共五集，观看顺序如下
第一集Supergirl：Season 5 -Episode 9 Crisis on Infinite Earths: Part One
第二集Batwoman ：Season 1 -Episode 9Crisis on Infinite Earths: Part Two
第三集The Flash：Season 6 -Episode 9Crisis on Infinite Earths: Part Three
第四集Arrow:Season 8-Episode 8Crisis on Infinite Earths: Part Four
第五集Legends of Tomorrow ：Season 5- Episode 0Crisis on Infinite Earths: Part Five
本次联动给DC大部分真人影视剧宇宙编号：
地球2: 逐星女 地球12: 2011年版绿灯侠电影 地球19: DC流媒体沼泽怪物 地球9: DC流媒体泰坦 地球21: DC流媒体末日巡逻队 地球96: 2006年版超人归来
这是Arrowverse宇宙第六次联动大事件Arrowverse Crossovers Event Ratings，前五次分别是：
1.Flash vs Arrow 闪电侠VS绿箭侠
第一集闪电S1E8-Episode: Flash vs. Arrow (2014)
第二集绿箭S3E8-Episode: The Brave and the Bold (2014)
2.Legends of Yesterday 昨日军团
第一集闪电S2E8-Episode: Legends of Today (2015)
第二集绿箭S4E8-Episode: Legends of Yesterday (2015)
番外：
第三集女超人S1E18-Episode: Worlds Finest (2016)
第四集女超人S2E8-Episode: Medusa (2016)
3.Invasion 支配者入侵
第一集闪电S3E8-Episode: Invasion! (2016)
第二集绿箭S5E8-Episode: Invasion! (2016)
第三集明日传奇S2E7-Episode: Invasion! (2016)
番外：
闪电S3E17-Episode: Duet (2017)
4.Crisis on Earth-X 地球X危机
第一集女超人S2E8-Episode: Crisis on Earth-X, Part 1 (2017)
第二集绿箭S6E8-Episode: Crisis on Earth-X, Part 2 (2017)
第三集闪电S4E8-Episode: Crisis on Earth-X, Part 3 (2017)
第四集明日传奇S3E8-Episode: Crisis on Earth-X, Part 4 (2017)
5.Elseworld 异世界危机
第一集闪电S5E9-Episode: Elseworlds, Part 1 (2018)
第二集绿箭S7E9-Episode: Elseworlds, Part 2 (2018)
第三集女超人S4E9-Episode: Elseworlds, Part 3 (2018)
6.Crisis on Infinite Earths 无限地球危机
见开头

Part character drama and part mystery, REUNION marks a groundbreaking concept in series television as it chronicles the lives of a group of six friends over the course of 20 years – all in just one season. From the hopes and dreams of 18-year-olds to the realities that irrevocably mark those lives two decades later, REUNION ’s stories are of love and loss, marriage and death, triumph and scandal. WILL (Will Estes, “U-571,” “American Dreams”) longs to leave his small town behind. Aided by an athletic scholarship, he will be the first in his family to go to college. CRAIG (Sean Faris, “Life As We Know It”), handsome and privileged, looks forward to the Ivy League with his girlfriend, SAMANTHA (Alexa Davalos, “The Chronicles of Riddick”), whose ambition is surpassed only by her looks and intelligence. The beautiful and sensual JENNA (Amanda Righetti, THE O.C.) dreams of becoming an actress; behind his cynicism, AARON (Dave Annable, “Little Black Book”) dreams that his relationship with Jenna will go beyond friendship. CARLA (Chyler Leigh, “Not Another Teen Movie”), innocent and quirky, must choose between loyalty to her father and staying near her best friends. REUNION opens in 2005 at the funeral of one of the friends, whose death is being investigated by DETECTIVE MARJORINO (Mathew St. Patrick, “Six Feet Under”). Before the identity of the deceased is revealed, we’re transported back to 1986, as the group is celebrating their high school graduation. The pilot episode follows all six through the summer of 1986, and we witness the formative events that alter their dreams and desires forever. Episode two finds the group a full year later, in 1987; episode three tells the story of a seminal event in 1988, and so on – culminating in the season finale at the friends’ 20th high school reunion. REUNION also will build toward answering two important questions raised in episode one: Which of the friends is dead? And how did that death occur?

洁妮是个梦想成为艺术家的女生，在学校里，洁妮邋邋遢遢、不修边幅的穿戴使她看起来活像是个怪胎，和周围花枝招展的女孩比起来，她显得那么灰头土脸，同龄人的女孩都为此而孤立她。 同洁妮正好相反，杰克是学校里最受欢迎的足球队长，也是无数女生心中的白马王子，某天，闲着无聊的杰克和同伴打赌，要把不起眼的洁妮变成最美丽最耀眼的校园舞会皇后，于是为了赢得赌局，杰克开始对洁妮狂追不舍。 与此同时，一直看洁妮百般不顺眼的女生“大姐头”、一位风骚的啦啦队长不明就里，又嫉又恨之下，当然想方设法对杰克的追求加以阻挠，当然，还有很多花色的人物掺杂故事其间，外国来的交流学生、贫嘴巴舌的黑人男生、暗恋女主角的木讷肥仔。

Fundamentalist sect member BeckyLyn is accused of killing her husband. Queenie, another wife in the polygamist sect, doesn't believe BeckyLyn is capable of such violence and desperate to prove her innocence reaches out to her excommunicated son Jordan for help in freeing his mother.

当特工人员杰里米·瑞恩斯（斯蒂芬·道尔夫 Stephen Dorff 饰）从昏睡中醒来，却发现自己置身于一个密闭、黑暗的空间里。他能听到马达的轰鸣以及来自周遭的震动，似乎自己正被关在一辆车的后背箱内。他怀疑因为欠下赌资而遭到报复，可是种种迹象表明这次绑架又跟赌博无关。后备箱内有LED计时器一次次倒计时，旁边还配备了无线电。通过无线电，他知道另一个自称白宫外事部官员的家伙也受到同样的待遇，绑架者的目的似乎想从杰里米口中套出一份重大的秘密。对方了然他的一切，连杰里米的女友也尽在掌控之中。
杰里米三缄其口，想尽一切办法从后备箱内逃出，绑架背后的真相正慢慢揭晓……

卡拉·丹弗斯生于氪星球，多年前星球毁灭的时候她逃到地球来，一直隐藏自己的超能力。如今24岁，卡拉觉得不能使用与生俱来的能力就像权利被剥夺，在她美丽的脸庞底下，她不知道自己是谁。但在一次意外灾难中，她被迫在众目睽睽下使用了超能力。被自己的英勇行为激发，卡拉有生以来第一次正面了自己的技能。她开始帮助城市里的人们，人们也注意到了她，甚至给她一个新名字：超女。