THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.

THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.

THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie. Guest stars (L-R): Noah Wyle as Doctor, Taylor Dearden as E.R. intern and Katherine LaNasa as E.R. nurse in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.

THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie. Guest star Quinta Brunson as Adrienne in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.

THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.

THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie. Guest star Questlove as the Tour Guide in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.

THE SIMPSONS: Marge’s crusade to get the family dog in better shape leads to her entering Santa’s Little Helper in canine agility competitions and a trip to the National Dog Show in Philadelphia. There, Marge and Homer suddenly find themselves — and the dog — mixed up in a historical conspiracy adventure worthy of a “National Treasure” movie. Guest star Kevin Bacon as Philly Concierge in the “Irrational Treasure” 800th episode of THE SIMPSONS airing Sunday, Feb. 15 (8:00-8:30 PM ET/PT) on FOX. THE SIMPSONS © 2026 20th Television / FOX.