S01E15: The Deep End
When Mabel befriends a cute merman trapped in the public pool, she's determined to help him out. Meanwhile, Dipper decides to volunteer as a lifeguard to see Wendy.
Previous Episode 
Season 1
Tourist Trapped
S1E1 / 15 Jun 2012
The Legend of the Gobblewonker
S1E2 / 29 Jun 2012
Headhunters
S1E3 / 30 Jun 2012
The Hand That Rocks the Mabel
S1E4 / 06 Jul 2012
The Inconveniencing
S1E5 / 13 Jul 2012
Dipper vs. Manliness
S1E6 / 20 Jul 2012
Double Dipper
S1E7 / 10 Aug 2012
Irrational Treasure
S1E8 / 17 Aug 2012
The Time Traveler's Pig
S1E9 / 24 Aug 2012
Fight Fighters
S1E10 / 14 Sep 2012
Little Dipper
S1E11 / 28 Sep 2012
Summerween
S1E12 / 05 Oct 2012
Boss Mabel
S1E13 / 15 Feb 2013
Bottomless Pit!
S1E14 / 01 Mar 2013
The Deep End
S1E15 / 15 Mar 2013
Carpet Diem
S1E16 / 05 Apr 2013
Boyz Crazy
S1E17 / 19 Apr 2013
Land Before Swine
S1E18 / 28 Jun 2013
Dreamscaperers (1)
S1E19 / 12 Jul 2013
Gideon Rises (2)
S1E20 / 02 Aug 2013
Season 2
Scary-oke
S2E1 / 01 Aug 2014
Into the Bunker
S2E2 / 04 Aug 2014
The Golf War
S2E3 / 11 Aug 2014
Sock Opera
S2E4 / 08 Sep 2014
Soos and the Real Girl
S2E5 / 22 Sep 2014
Little Gift Shop of Horrors
S2E6 / 04 Oct 2014
Society of the Blind Eye
S2E7 / 27 Oct 2014
Blendin's Game
S2E8 / 10 Nov 2014
The Love God
S2E9 / 26 Nov 2014
Northwest Mansion Noir
S2E10 / 16 Feb 2015
Not What He Seems
S2E11 / 09 Mar 2015
A Tale of Two Stans
S2E12 / 13 Jul 2015
Dungeons, Dungeons, & More Dungeons
S2E13 / 03 Aug 2015
The Stanchurian Candidate
S2E14 / 24 Aug 2015
The Last Mabelcorn
S2E15 / 07 Sep 2015
Roadside Attraction
S2E16 / 21 Sep 2015
Dipper and Mabel vs. the Future
S2E17 / 12 Oct 2015
Weirdmageddon Part I
S2E18 / 26 Oct 2015
Weirdmageddon 2: Escape from Reality
S2E19 / 23 Nov 2015
Weirdmageddon 3: Take Back the Falls
S2E20 / 15 Feb 2016
Jason Ritter
Dipper Pines (voice)
Kristen Schaal
Mabel Pines (voice)
Alex Hirsch
Grunkle Stan / Soos Ramirez / Old Man McGucket (voice)
