A scientist attempts to transplant a gorilla's brain into a man.
| Actor | Role |
|---|---|
 Richard TalmadgeHarry Willis | Harry Willis |
 Billie DoveHelen Hendon | Helen Hendon |
 Stuart HolmesRichard Drake | Richard Drake |
 George SiegmannWang Wu | Wang Wu |
 Tom WilsonCasanova Clay | Casanova Clay |
 Charles ClaryHorace Hendon | Horace Hendon |
 Douglas GerrardMr. Black | Mr. Black |
 Frankie MannMrs. Spinks | Mrs. Spinks |
| FFred KirbyDr. Spinks | Dr. Spinks |