A film projectionist longs to be a detective, and puts his meager skills to work when he is framed by a rival for stealing his girlfriend's father's pocketwatch.

Buster Keatonas Projectionist / Sherlock, Jr.
Kathryn McGuireas The Girl
Joe Keatonas The Girl's Father / Man on Film Screen
Erwin Connellyas The Hired Man / The Butler
Ward Craneas The Local Sheik / The Villain
Doris Deaneas Girl Who Loses Dollar Outside Cinema (uncredited)
George Davisas Conspirator (uncredited)
Kewpie Morganas Conspirator (uncredited)
Steve Murphyas Conspirator (uncredited)
Elgin Lessley