The Brain from Planet Arous 1957

Synopsis:

An evil alien brain, bent on world domination, takes over the body of an atomic scientist, while a "good" alien brain inhabits the body of the scientist's dog and waits for an opportunity to defeat the evil brain.

Directed by: Nathan H. Juran
Written by: Ray Buffum
Runtime: 71 minutes
Critics score:
Tagline: Science-Fiction's most astounding story!
Cast:
John Agar
John Agar
Steve March 
Joyce Meadows
Joyce Meadows
Sally Fallon 
Robert Fuller
Robert Fuller
Dan Murphy 
Thomas Browne Henry
Thomas Browne Henry
John Fallon 
Henry Travis
Henry Travis
Colonel Frogley 
E. Leslie Thomas
E. Leslie Thomas
General Brown