Director/a
Howard Bretherton
DIRECTOR/A
Reparto (por orden de créditos)
Robert Lowery
Ken Morgan
George Macready
Prof. Ernst
Ralph Morgan
Professor Franklin Arnold
Carole Mathews
Babs Arnold
Willie Best
Flash
Jack Ingram
Dick Nordik
Anthony Warde
Joe Flint
Ted Mapes
Joe Butle
Eddie Parker
Blake
Stanley Price
Mead
Charles King
First Cop with Thor [Ch. 10,11,13]
Kenneth MacDonald
Police Inspector Hamilton [Ch. 8,12]
Bud Osborne
Mason - Zoo Night Watchman [Ch. 3,8,10]
Steve Benton
Police Officeruncredited
Ray Corrigan
Thor the Gorillauncredited
Oliver Cross
Reporteruncredited
Dulce Day
George Eldredge
Professor Amesuncredited
John Elliott
Professor Marsdenuncredited
Dick Gordon
Herschel Graham
Kit Guard
Zoo Guarduncredited
Henry Hall
Dr. John Draperuncredited
Eddie Kane
Dr. Draper's Assistantuncredited
Forbes Murray
Professor Jonathan Shawuncredited
Dick Rush
McGarry - Armored Truck Guarduncredited
Lee Shumway
Tunnel Foreman Hartleyuncredited