THE SIMPSONS: A young Bart and Homer in the “Barthood” episode of THE SIMPSONS airing Sunday, Dec.13 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS ™ and © 2015 TCFFC ALL RIGHTS RESERVED.

THE SIMPSONS: A young Bart shares a moment with his grandfather in the a“Barthood” episode of THE SIMPSONS airing Sunday, Dec.13 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS ™ and © 2015 TCFFC ALL RIGHTS RESERVED.

THE SIMPSONS: Homer tries to connect with Bart in the “Barthood” episode of THE SIMPSONS airing Sunday, Dec.13 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS ™ and © 2015 TCFFC ALL RIGHTS RESERVED.

THE SIMPSONS: Lisa tells an overly uncaring Bart that his short-comings are his own doing in the “Barthood” episode of THE SIMPSONS airing Sunday, Dec.13 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS ™ and © 2015 TCFFC ALL RIGHTS RESERVED.

THE SIMPSONS: Maggie gets a new friend in the “Barthood” episode of THE SIMPSONS airing Sunday, Dec.13 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS ™ and © 2015 TCFFC ALL RIGHTS RESERVED.

THE SIMPSONS: Bart's journey to become a young man is shaped by all his earlier relationships in the “Barthood” episode of THE SIMPSONS airing Sunday, Dec.13 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS ™ and © 2015 TCFFC ALL RIGHTS RESERVED.