In 'The Sign of Four (2001)', Sherlock Holmes and Dr. Watson are hired by a young woman to find her father's missing treasure. As they investigate, they uncover a dark secret and encounter dangerous criminals.

When a wealthy man is found dead on the moors, detective Sherlock Holmes and his loyal companion Dr. John Watson are called to the mysterious Baskerville estate to investigate a curse and a killer dog lurking in the shadows. As they dig deeper, they uncover a web of dark secrets and a sinister plot that threatens their lives.

Sir Arthur Conan Doyle's Sherlock Holmes - the world's greatest detective - faces a most alluring adversary... Legendary opera star Irene Adler is threatening to destroy the King of Bohemia's reputation with proof of their illicit affair. The evidence? A photograph. Her ransom? The king's hand in marriage. But not only does investigating detective Sherlock Holmes already know Irene from the past, he also knows that the queen of manipulation would never resort to such a common crime. After uncovering her true ambitions, Holmes draws the cunning songstress into a well-matched game of cat and mouse

When a series of ritual murders plague the streets of Whitechapel, Sherlock Holmes and Dr. John Watson are called to investigate. As they dive deeper into the case, they uncover a dark and twisted secret that leads them to the world of vampires. With the clock ticking, Holmes must rely on his deductive skills to stop the killings and uncover the truth.