When she receives pearls beyond price and a mysterious message from an anonymous source, Miss Mary Morstan goes to the famous consulting detective of 221B Baker St., Mr. Sherlock Holmes for advice in how to answer the message. Together with his staunch comrade, Dr. John Watson, and a mutt named Toby, Holmes tracks down the secret of the Sign of Four.

在法国大革命战争期间，在 HMS.Defiant号上，公平的克劳福德船长陷入了一场意志之战，与他残酷的副手斯科特-佩吉特中尉进行了一场意志之战，他的粗暴指挥风格将船员推向了叛变。

1951 film by Herbert Wilcox

19世纪，年幼的福尔摩斯和年幼的华生医生在同一所寄宿学校就读。福尔摩斯在幼年就表现出了非凡的观察和逻辑推理能力，这让他在学校里很受同学注目。他与华生还有他暗恋的姑娘Elizabeth Hardy一起，在一次偶发的自杀案中抽丝剥茧逐渐走入伦敦的黑巷中破获了惊人的罪案。

Helen Stoner needs the great man's help. She lives in a country mansion with her flamboyant and sinister guardian Grimesby Raylott, who has travelled abroad and brought home some souvenir livestock. Recently her sister Julia, about to be married and made by Raylott to sleep in a bed that was screwed to the floor, died in mysterious circumstances. Her final words referred to a "speckled band." Helen is fearful for her own safety and Holmes and Watson investigate.

The dead body of grumpy Bill McCarthy is found, brained with a rock, and his son James, with whom he did not get on, is arrested. James' girl-friend approaches Holmes, who discovers that Bill's dying words were nothing to do with "a rat" but concerned with the days of the Australian Gold Rush, decades earlier