An alien from Venus tries to take over the world with the help of a disillusioned human scientist, as his wife, his best friend and the friend's wife try to intervene.
Lee Van Cleef
as Dr. Tom Anderson
Beverly Garland
as Claire Anderson
Peter Graves
as Dr. Paul Nelson
Sally Fraser
as Joan Nelson
Russ Bender
as General James Pattick
Jonathan Haze
as Pvt. Miguel Ortiz
Dick Miller
as Sgt. Neil
Paul Harbor
as Floyd Mason
Charles B. Griffith
as Dr. Pete Shelton
Karen Kadler
as Ellen Peters
Taggart Casey
as Sheriff N.J. Shallert
Thomas E. Jackson
as George Haskell
