Help!... It's the Hair Bear Bunch! (1971)

S1E5 No Space Like Home

The Hair Bear Bunch jumps at the chance for fame and excitement when they hear about a space mission to Mars organized by Professor Nielsen Rockabuilt. However, Mr. Peevly and Botch secretly hitch a ride, leading to an unexpected landing on the alien world of Turulia. To their surprise, the Turulians choose Mr. Peevly as their new ruler. While trapped in the aliens' dungeons, the Hair Bear Bunch discovers that a new leader is elected daily, with the previous one confined in a glass cage.