[s1e15] The Deep End Now

Dipper takes a job as an assistant lifeguard to be closer to Wendy. However, he is forced to work under the strict, rule-obsessed head lifeguard, Mr. Poolcheck .

Mabel meets Mermando , a boy trapped in the pool's filter section. She discovers he is actually a merman and vows to help him escape to the open ocean. [S1E15] The Deep End

The end credits cryptically feature the "Vigenère cipher" for the first time in the series. Dipper takes a job as an assistant lifeguard