Robert Lowery
Ken Morgan
George Macready
Prof. Ernst
Ralph Morgan
Prof. Franklin Arnold
Carole Mathews
Babs Arnold
Willie Best
Flash
Jack Ingram
Dick Nordik
Anthony Warde
Joe Flint
Ted Mapes
Joe Butler
Eddie Parker
Blake
Stanley Price
Mead
Charles King
First Cop with Thor
Kenneth MacDonald
Police Inspector Hamilton
Bud Osborne
Mason
Ray Corrigan
Thor
John Elliott
Prof. Marsden
Kit Guard
Zoo Guard