It Conquered the World

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.

• 
  Roger Corman

• 
  Lee Van Cleef
  Dr. Tom Anderson
• 
  Beverly Garland
  Claire Anderson
• 
  Peter Graves
  Dr. Paul Nelson
• 
  Sally Fraser
  Joan Nelson
• 
  Russ Bender
  General James Pattick
• 
  Jonathan Haze
  Pvt. Miguel Ortiz
• 
  Dick Miller
  Sgt. Neil
• 
  Paul Harbor
  Floyd Mason
• 
  Charles B. Griffith
  Dr. Pete Shelton
• 
  Karen Kadler
  Ellen Peters
• 
  Taggart Casey
  Sheriff N.J. Shallert
• 
  Thomas E. Jackson
  George Haskell
• 
  Marshall Bradford
  U.S. Secretary Platt
• 
  David McMahon
  Gen. Carpenter
• 
  Paul Blaisdell
  The Monster (uncredited)