The Mystery Club is a 1926 American silent mystery film directed by Herbert Blaché and starring Matt Moore, Edith Roberts, and Mildred Harris. It was based on a story from Arthur Somers Roche's Crimes of the Armchair Club.

Plot

As described in a film magazine, the Mystery Club is an organization of millionaires, the youngest member of which is Dick Bernard. At the instigation of Cranahan, they wager that crimes can be committed without detection by the police, the arbiter of the wager being Inspector Burke. An agreement is drawn up which calls for the forfeiture of $25,000 should any crime go awry. They draw lots to decide which of the members is to be the criminal. None of the members know which of them has the lot with the double X, Burke being the sole possessor of the details.