Alex Callam

as Commander (uncredited)

as Doctor Calloway

as Detective Dave Lewis

as Mug (uncredited)

as Investigator Hogan

as Butch

as Kurt Redman

as Big Jim Johnson

as Al Bolger

as James Benson

as Capt. Long [Chs. 1-2, 4, 11-12]

as Square Deal Scottie

as Van Martin - Announcer

as Fred Morgan

as Arthur Enslee