Day in Gravity Falls History - March 15 (2025)

While at the pool during a heatwave, Mabel befriends someone by the deep end, only to reveal himself as a merman, and wants to get back home in the ocean as Dipper volunteers as a lifeguard to get close to Wendy with Stan fighting to get a good seat and let Gideon win that seat in "The Deep End", premiered 12 Years Ago on this day.