Case Closed: The Phantom of Baker Street, known as Detective Conan: The Phantom of Baker Street (名探偵コナン ベイカー街の亡霊, Meitantei Konan: Beikā Sutorīto no Bōrei) in Japan, is the 2002 Japanese animated science fiction mystery film and the sixth Case Closed feature film, released in Japan on April 20, 2002.

[3] The story features several characters from and references to the Sherlock Holmes series, which Detective Conan is heavily inspired by, and Jack the Ripper.

One night, in a heavily guarded room at the top of the Schindler building where Hiroki lives, he finishes an artificial intelligence system, Noah's Ark, and sends the software through the telephone lines.

Conan, Richard, Rachel and the Detective Boys (including Haibara Ai) are attending the demonstration, but cannot participate without special badges, which have been allocated to children associated with the game's investors and prominent socialites such as Serena.

Discovering that Kashimura's keyboard has blood stains on three of the keys (R, T, and J), Conan decides to participate in the demonstration, hoping that the game would lead him to an answer.

When the demonstration begins, Hiroki's artificial intelligence system, Noah's Ark, announces it has taken control, but it tells the audience that if none of the fifty people are able to survive the game, it will kill the kids in reality using a large electromagnetic burst.

Conan and the Junior Detectives choose the fifth, a re-creation 19th century London set in the world of Sherlock Holmes.

Meanwhile, in the real world, Booker investigates the case and reveals that Kashimura's murderer is the company's president, Thomas Schindler, who Hiroki had discovered was a descendant of the original Jack the Ripper.

In a private conversation, Hiroki says he was satisfied with the outcome, as he was hoping the kids can paint a brighter future than their parents, and that he was happy he could also participate as a player in the game.

[8] Carlo Santos of Anime News Network commended the film's departure from the series' cinematic formula with its "picturesque" London setting and double mystery alongside the usual "action-packed ending", but felt it was hampered by poorly paced execution, "inconsistent production values", and no utilization of Sherlock Holmes himself, calling it "an awkwardly stretched-out episode instead of a feature film, and Holmes doesn't even show up to help.