When Retirement Castle is closed, Marge asks Grampa and two other octogenarians to move in; Nelson befriends Bart after Bart defends him.
Genres: Animation , Comedy , Family
Keywords: adult-animation , adult-humor , cartoon , dysfunctional-family , family , hilarious , irreverent , kids , middle-class , nuclear-power-plant , parody , satire , school , sitcom , social-satire , latest-episodes , watch-series-online , farce