Behind the Curtain is the 2nd episode of Season 2, alongside with "Jar She Blows!"
It begins with the Dock Hag saying it's a beautiful morning for writing tickets. As she walks out, K'nuckles shows Flapjack a "magic trick". He tosses him into the house. Flapjack wonders how did he do it(Idiot). K'nuckles begins searching for his unpaid dock tickets. But Flapjack stated that he is in love with the Dock Hag and wants to kiss her toes. K'nuckles says that he never loved any man or woman, he would rather wrestle a shark. Just then Flapjack spots a box with the name "K'nuckles" on it. K'nuckles asks if he found his tickets. But Flapjack found a doll of K'nuckles. K'nuckles then tells Flapjack that was a Doo-Doo Doll(parody of Voo-Doo dolls). Just then the Dock Hag walks in and says if she sees Flapjack and K'nuckles, she'll give them a ticket and destroy them. K'nuckles and Flapjack try to find a way out of the house. Just then they go into a strange room with a toilet in it. The Dock Hag walks in and sees nodbody is there. Flapjack and K'nuckles are behind the bath curtain. They wait quietly for the Dock Hag to be gone. Few hours later they try to sneak out. Then The Dock Hag says where are they going, but holds one of her dolls( named Little K'nuckies). She wishes that her doll was the real K'nuckles. Just the doll spoke(K'nuckles really). He tells her what to do and never do again. Soon the Dock Hag said that the doll is his tickets. K'nuckles destroys the doll but The Dock Hag said what is he doing here. K'nuckles said that he loves her. The Dock Hag says to kiss her big toe. Then Flapjack lifts the floorboard and says its his favorite, Shark Wrestling. K'nuckles kisses the Dock Hag's toe. But she says that wasn't her big toe. K'nuckles then falls and gets beaten by the sharks. Flapjack says that was awesome. But then she says the Dock Hag give him a ticket for breaking in her heart!
- The Dock Hag keeps dolls of K'nuckles which are made out of his tickets.
- A running gag is shown where Flapjack thought that K'nuckles is in love with the Dock Hag.
- It was never mentioned what the Dock Hag's real name is.
- K'nuckles' mood for shark wrestling is introduced.
- This episode implies that Flapjack and K'nuckles both saw the Dock Hag using the toilet
- The shark wrestling theme is similar to the background music from "Star Wars: The Phantom Menace" in the fisht between Obi-Wan Kenobi and Darth Maul.
- The only major role of the Dock Hag.