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.
1970
1999
1995
1981
1977
2001
1990
1998
2007
1979
2019
2018
2015
1964
2000
1983
2003
1988