Samuel Spade
Brigid O'Shaughnessy
Iva Archer
Joel Cairo
Lt. of Detectives Dundy
Effie Perine
Kasper Gutman
Det. Tom Polhaus
Miles Archer
Wilmer Cook
Luke
Frank Richman
District Attorney Bryan
Reporter (uncredited)
Bit Part (uncredited)
Stenographer (uncredited)
Policeman (uncredited)
Captain Jacoby (uncredited)
Announcer (uncredited)
Ship's Mate (uncredited)