Dennis O'Brien
'Professor' Fredrick Simpson Schicka
Inspector Bruger
Irma Rand
Sylvia Rand
Gail Chase
Ed Gannon
Steve Belzig alias Vic Lundy
Bill Rafferty
Eddie Paige
Harry Barton
Sparring Partner
Tom Fallon, alias Steve Rand
Henry - the Bartender
Bookie (uncredited)
Boxing Match Spectator (uncredited)
Waiter (uncredited)
Nightclub Patron (uncredited)
Bookie (uncredited)