Space: 1999 Season 1 Episode 20
John Koenig finds himself trapped on the planet Zenno, in the home of an alien scientist and his daughter. Advanced two million years beyond Earthmen, the aliens consider Koenig their missing link. Faced with the threat of being treated like an experimental animal for the rest of his life, Koenig uses an unexpected weapon to confound his captor: love.
Serie: Space: 1999
Episode Title: Missing Link
Air Date: 1976-01-22