Suddenly A Stranger...in The Twilight Zone
And When The Sky Was Opened (Episode 11 - December 11, 1959):
Col. Clegg Forbes (Rod Taylor) and two fellow astronauts have returned from their first space flight. They soon discover that no one remembers them - as if they never existed.
In His Image (Episode 103 - January 3, 1963):
Alan Talbot doesn't understand why his hometown seems so unfamiliar; why is he driven to kill and what are those strange noises in his head? He's about to get some answers when he comes face-to-face with his double.
The Last Night Of A Jockey (Episode 125 - October 25, 1963):
Mickey Rooney is Grady, a former jockey, banned from horse racing and down on his luck. When he gets one wish, he grows to over eight feet tall - which, he'll find out, can be too big.