17. Gilligan’s Planet
Gilligan’s Planet was the second animated spin-off of the sitcom Gilligan’s Island (the first being The New Adventures of Gilligan, which wasn’t too bad).
It featured almost all of the cast from the original show in voice roles and the premise was that the same passengers who got shipwrecked in the sitcom were now space-ship-wrecked on distant planet.
It was ludicrous, quite frankly, and kids didn’t fall for the overuse of the same characters in far-fetched setting. It lasted one season, which was comprised on thirteen episodes.