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
Stanley Price
Harry Barton
A
A.J. Roth
Sparring Partner
