Hugh Beaumont

Dennis O'Brien

Edward Brophy

'Professor' Fredrick Simpson Schicka

Richard Travis

Inspector Bruger

Joan Valerie

Irma Rand

Wanda McKay

Sylvia Rand

Rebel Randall

Gail Chase

William Tannen

Ed Gannon

Greg McClure

Steve Belzig alias Vic Lundy

Anthony Warde

Bill Rafferty

Abner Biberman

Eddie Paige