Aliens from Outer Space are slowly switching places with real humans -- one of the first being a young man about to get married. Slowly, his new wife realizes something is wrong, and her suspicions are confirmed when her husband's odd behaviour begins to show up in other townspeople.

Tom Tryonas Bill Farrell
Gloria Talbottas Marge Bradley Farrell
Alan Dexteras Sam Benson
Jean Carsonas Helen Rhodes
Ken Lynchas Dr. Wayne
Maxie Rosenbloomas Max Grady - Bartender
Peter Baldwinas Officer Hank Swanson
John Eldredgeas Police Capt. H.B. Collins
Robert Iversas Harry Phillips