Elenco
Harold Lloyd
Harold Bledsoe
Barbara Kent
Billie Lee
Noah Young
Patrick Clancy SFPD
Charles Middleton
John Thorne / The Dragon
Will Walling
Captain Walton, SFPD 3rd Div.
Grady Sutton
Man at Party (silent version) (scenes deleted)
Brooks Benedict
Handcuffed Prisoner at Police Station (uncredited)
Eddy Chandler
Cop (uncredited)
Rae Daggett
Woman Sitting in Police Station (uncredited)
Douglas Haig
Buddy Lee (uncredited)
Edgar Kennedy
SFPD Desk Sergeant (uncredited)
Tetsu Komai
Florist Henchman (uncredited)
James B. Leong
Florist Henchman / High Priest (uncredited)
James Pier Mason
Barry Steele / Dick the Dude (uncredited)
Nelson McDowell
1st Train Passenger (uncredited)
James Wang
Dr. Chang Gow (uncredited)
Blue Washington
Thorne's Henchman (uncredited)
Leo Willis
Cop (uncredited)
Equipe
Paul Gerard Smith
Dialogue
Felix Adler
Story
Clyde Bruckman
Director
Malcolm St. Clair
Director
John L. Murphy
Production Manager
Bernard W. Burton
Editor
Clyde Bruckman
Story
Harold Lloyd
Producer
Liell K. Vedder
Art Direction
James H. Anderson
Production Assistant
Gaylord Lloyd
Assistant Director
C. Bakaleinikoff
Music Arranger
Carl Himm
Editor
Lodge Cunningham
Sound
Harold Lloyd
Writer
George D. Ellis
Sound
Henry N. Kohler
Director of Photography
Walter Lundin
Director of Photography