Calificación
Reparto

Ray Molina
Dr. Blake

Ebby Rhodes
Dr. Blake's Daughter

Ern Dugo
Prof. Grant

Forest Duke
Dr. Bernstein

Will Long
Prof. Larsen

Ben Smith
Prof. Long

Chuck Alford
Capt. Popejoy

Ross Thompson
Actor

Philip Ahn
Mao Tse Tung (uncredited)