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.
John Agar
as Steve March
Joyce Meadows
as Sally Fallon
Robert Fuller
as Dan Murphy
Thomas Browne Henry
as John Fallon
Henry Travis
as Colonel Frogley
E. Leslie Thomas
as General Brown
Tim Graham
as Sheriff Wiley Pane
Bill Giorgio
as Russian
Ken Terrell
as Colonel in Conference Room
Dale Tate
as Professor/voices of Gor & Vol (uncredited)
