The Brain from Planet Arous(1957)
Videos: Trailers, Teasers, Featurettes
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.
The Brain from Planet Arous streaming: where to watch online?
You can buy "The Brain from Planet Arous" on Amazon Video as download or rent it on Amazon Video online.