Arthur Hoerl (Screenplay) · Spencer Gordon Bennet (Director) · George H. Plympton (Screenplay)
Judd Holdren
Rex Barrow
Vivian Mason
Ella Dorn
Michael Fox
Dr. Ernst Grood
Forrest Taylor
Prof. Edmund Dorn
Gene Roth
Reckov
Ted Thorpe
Tim Johnson
Karl 'Killer' Davis
Karlo
Jack George
Jarva
Frederic Berest
Alden
John Cason
Hopper
Lee Roberts
Wesley Brenn
Nick Stuart
Darl
Joseph Mell
Lah
Pierre Watkin
Ned Hilton
Leonard Penn
Ken Wopler
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Dr. Ernst Grood , having already dominated the planet Ergro, now intends to take over the control of the Earth. Unfortunately for him, reporters oppose his sinister designs.
