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 Tryon
as Bill Farrell

Gloria Talbott
as Marge Bradley Farrell

Alan Dexter
as Sam Benson

Jean Carson
as Helen Rhodes

Ken Lynch
as Dr. Wayne

Maxie Rosenbloom
as Max Grady - Bartender

Peter Baldwin
as Officer Hank Swanson

Jack Orrison
as Officer Schultz

John Eldredge
as Police Capt. H.B. Collins

Robert Ivers
as Harry Phillips
SWITCH.
'I Married A Monster From Outer Space' doesn't stray too far from the run-of-the-mill 50s sci-fi that has become a pop-culture cliché, but it does distinguish itself enough to almost be regarded a classic of the genre. Real thought has clearly gone into it, to offer audiences at the time something m...