Lois and Peter are mistaken for young parents by another couple at Stewie's school and are invited to live in a millennial apartment complex, leaving Meg and Chris home alone.
Tropes:
- Acquired Situational Narcissism: Peter and Lois get big heads when joining younger parents.
- Brutal Honesty: Peter at one point criticizes how hideous a clay horse made by a kid is. The kid who made it is upset but his grown-up self says that he respects his honesty.
- Continuity Snarl: Without their parents around, Meg and Chris prove incapable of looking after themselves and allow the house to fall apart. Despite the episode "Trading Places" showing that the two of them are actually more capable of keeping the house afloat than their parents.
- Death of a Child: The young parents' children all drown in a pool while their parents go to a musical event, with Stewie as the sole survivor. Stewie tries to fish them out in a possible attempt to save them, but fails miserably.
- The Dog Bites Back: Offscreen. With Peter and Lois gone, Chris and Meg assume control of the house. The first thing they declare is that they are going to crate Brian. Smash Cut to both Chris and Meg trapped in a kennel.
- Paper-Thin Disguise: All Chris and Meg did was change their clothes and hairstyles, along with Chris wearing a fake mustache and Meg wearing different glasses. Lois sees through these disguises.
- Parental Neglect: All the millennial parents leave their children unsupervised at home while they go to Coachella, resulting in their deaths in the pool while Stewie is the only survivor.
- Purely Aesthetic Glasses: Lois eventually reveals that she and Peter are old and that Chris and Meg are young to the couple that mistook them for millennials. She accuses them of being able to realize that sooner if they didn't wear glasses for aesthetic reasons. When they take the glasses off, they're shocked at the Griffin's true ages.
- Shout-Out:
- Peter references Fast Times at Ridgemont High when parodying the famous Sexy Surfacing Shot scene, by climbing the pool ladder himself.
- He also does a Charles in Charge Crossword Puzzle.
- Skewed Priorities: Chris is more concerned with bragging about his start-up businesses than finding out where his parents are. Meg lampshades it.
- What Happened to the Mouse?: The small subplot of Stewie being left alone and the kids drowning in the pool is never resolved beyond Stewie being back at home in the final scene.
