MST3K Ep. 104 - "Women of the Prehistoric Planet"
A marooned spaceship on a strange planet leaves only a young boy as the survivor.
The boy grows up into manhood, and when the rescue ship comes along he takes one of the rescue women as his companion. A riffed Planet of the Apes ending occurs when the departing rescue ship names the planet "Earth." Catchphrase: Hi Keeba! (used in later episodes when a character performed a martial arts move).
Despite its low production number, this episode was the last filmed and last aired of the season.