Gravity Falls Ep 2

It's fishing season in Gravity Falls and Stan is looking at Dipper and Mable to be his "fishing buddies," but they'd rather go with Soos on an expedition to find a legendary sea monster known as the Gobblewonker. Meanwhile, Grunkle Stan tries desperately to find replacement "fishing buddies".
From:http://www.imdb.com/title/tt1865718/episodes