Harold Lloyd
Role: Harold Bledsoe
Barbara Kent
Role: Billie Lee
Noah Young
Role: Patrick Clancy SFPD
Charles Middleton
Role: John Thorne / The Dragon
Will Walling
Role: Captain Walton, SFPD 3rd Div.
Grady Sutton
Role: Man at Party (silent version) (scenes deleted)
Brooks Benedict
Role: Handcuffed Prisoner at Police Station (uncredited)
Eddy Chandler
Role: Cop (uncredited)
Rae Daggett
Role: Woman Sitting in Police Station (uncredited)
Douglas Haig
Role: Buddy Lee (uncredited)
Edgar Kennedy
Role: SFPD Desk Sergeant (uncredited)
Tetsu Komai
Role: Florist Henchman (uncredited)
James B. Leong
Role: Florist Henchman / High Priest (uncredited)
James Pier Mason
Role: Barry Steele / Dick the Dude (uncredited)
Nelson McDowell
Role: 1st Train Passenger (uncredited)
James Wang
Role: Dr. Chang Gow (uncredited)
Blue Washington
Role: Thorne's Henchman (uncredited)
Leo Willis
Role: Cop (uncredited)