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