The Brain from Planet Arous (1957)

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

Starring: John Agar, Joyce Meadows, Robert Fuller, Thomas Browne Henry, Henry Travis, E. Leslie Thomas

Links: IMDb, Movie posters, Movie stills