Beach Day/Gone Baby Gone.Beach Day: While watching TV, Star realizes that everything is lining up for the destined Beach Day. She and Marco head to the beach where they encounter various obstacles along the way. When they finally arrive, Star realizes that she left the camera and the Beach Day photo in the taxi and panics, but Marco suggests that they have fun anyway. While doing so, an old woman appears with a camera having taken their photo and assuming they were a couple. Star and Marco rejoice, but the former suddenly feels unfulfilled as she still does not feel happy. She visits Father Time who reveals that she herself left the photo with Father Time to give to her past self. Even though Star's happiest moment may have been fake, it gave her something to look forward to. Realizing how important Beach Day was supposed to be to her, she snaps a picture of the photo on her phone and leaves it with Father Time, so that he could give it to Star earlier.
Gone Baby Gone: As Marco puts Meteora and Mariposa to bed, Hekapoo arrives and warns Marco against returning to Mewni due to some unspecified danger. However, she leaves the portal open and both babies crawl through. Marco and Star arrive in Hekapoo's dimension where they find that the two are now teenagers. Meteora and Mariposa capture the two and take them to see Wyscan the Granter so that he can give Mariposa magic powers of her own. She backs down at the last minute and she and Marco decide to fight Wyscan when he proves immune to Star and Meteora's magical powers. Afterwards, Marco finally proves to Mariposa that they are siblings and that he loves her. When Mariposa and Meteora decide that they want to stay in the dimension, Marco and Star convince them to come back for the food and he quietly puts them back to bed.