FILMS… Invasion of the Body Snatchers (1978)

Your Duplicate Will Find A Way... Four San Francisco residents become aware that when the city's inhabitants sleep, they are being replaced by their exact duplicate. These duplicates are aliens from another planet, with no emotions.

TV… Star Trek (1967), S1 Ep28, The City on the Edge of Forever

Captain Kirk saves the Universe, with his love life in ruins... Captain Kirk does an Outlander as he goes back in time, meets a lovely Englishwoman and then he hopes to prevent the Nazis winning World War II.