Scott Kolk
— Larry Campbell (as Scott Colton)
Mary Russell
— Betty Tisdelle
Thurston Hall
— Prof. Tisdelle
Arthur Loft
— Inspector Nat Corrigan
Gene Morgan
— Flashlight
Frank C. Wilson
— Craig Banning
Ann Doran
— Margie Blake
J. Farrell MacDonald
— Coach Pearson
George Offerman, Jr.
— Soupy Pettie
Nick Lukats
— Roy Jennings
Roland Got
— Kong Lee
Albert Dekker
— Jeffrey Thompson (as Albert Van Dekker)
Ruth Hilliard
— Babs