Without a Clue

Without a Clue is a 1988 British comedy film directed by Thom Eberhardt and starring Michael Caine and Ben Kingsley. It is based on Sir Arthur Conan Doyle's characters from the Sherlock Holmes stories but, in this version, the roles are reversed: Dr. John Watson is the brilliant detective, while "Sherlock Holmes" is an actor hired to pose as the detective so that Watson can protect his reputation as a physician.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.