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)