SpongeBob SquarePants Season 5 Episode 29

SpongeBob’s parents go missing and he suspects that his cousin BlackJack, the family bully who used to torment SpongeBob when they were little, has kidnapped them. SpongeBob goes to BlackJack’s house and sees his parents. They explain to SpongeBob that they are throwing a party for BlackJack’s return from prison. His cousin arrives and all of them enjoys the party.