It's the hottest day of the Summer and the opening day of the Gravity Falls pool, where Mabel befriends a mysterious boy named Mermando.
Episode rating
Cast of episode
85
10
3
1
- Mabel Pines
- Dipper Pines
- Wendy Corduroy
- Deputy Durland
- Grunkle Stan
- Li'l Gideon
- Waddles
- Sheriff Blubs
- Tyler the Cute Biker
- Additional Voices
- Lee
- Toby Determined