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.
1985
1966
1994
2019
2017
2018
1940
2014
1999
2016
1980
1938
2015
1958
2009
2013
1920
2004