Popeye the Sailor S01 E67 Out of This World

"Popeye the Sailor-Man!"

Popeye uses The Professors time machine to take Olive, Swee' Pea and himself on a trip to the moon. When there they find it's just like earth. .. No reason is given to how or way it's no longer populated by little cheese people, presumably the moon men killed them all and stole their land.