A film projectionist longs to be a detective, and puts his meagre skills to work when he is framed by a rival for stealing his girlfriend's father's pocketwatch.
Buster Keaton
as Projectionist / Sherlock, Jr.
Kathryn McGuire
as Girl
Joe Keaton
as Girl's Father / Man on Film Screen
Erwin Connelly
as Hired Man / Butler
Ward Crane
as Sheik / Villain
Doris Deane
as Girl Who Loses Dollar Outside Cinema (uncredited)
Christine Francis
as Candy Store Girl (uncredited)
George Davis
as Conspirator (uncredited)
Kewpie Morgan
as Conspirator (uncredited)
Steve Murphy
as Conspirator (uncredited)
John Patrick
as Conspirator (uncredited)
Betsy Ann Hisle
as Little Girl (uncredited)
