What Have You Done?

What Have You Done? is the twenty-fourth episode in season one of Adventure Time.

Synopsis
Finn and Jake capture Ice King under order of Princess Bubblegum without even knowing what he has done wrong.

Plot
Finn and Jake are seen in the Ice Kingdom at night, trying to avoid some guard penguins wielding Ice axes. Finn says that their secret mission to capture the Ice King is underway, he then says he probably shouldn't say that stuff out loud. They ring Ice King's doorbell and Ice King appears to confront the guest. At first Ice King tries zapping, but then realizes no one is there. He notices that a small can of peanut brittle was left on his doorstep. Ice King opens the can and suddenly, Finn and Jake spring out of the can and grab his crown. Ice King attempts to shoot them but he is unable to, because his crown has all his powers in it. Finn yells out wrap attack and ties up Ice King with a rope. Jake asks why they did this again, and Finn says Princess Bubblegum explained it all, but was not very precise. They return with Ice King to the Candy Kingdom, which seems to be deserted. Princess Bubblegum arrives wearing a gas mask and spraying a green fog everywhere. She takes them to a wall with a face on it and the face asks for the password. Bubblegum then pinches the face's cheek, and the wall suddenly turns into a door.

Princess Bubblegum says that the door leads to the dungeon where they would put the Ice King. Before Princess Bubblegum can have a chance to explain what bad thing Ice King did, she is called to the grand hall. Finn and Jake decide to guard the Ice King until she returns. Finn and Jake throw Ice King in a jail cell, with only two bars, but then add more. Jake is looking at Ice Kings crown and says it was stolen, but Ice King states that he made it with the magic that he stole. Ice King begins to tell the two that he is innocent, and didn't deserve to be here. But, Jake says that he's a jerk and should stay in jail. Then Ice King shows them a mirror (which was broken repeatedly after Ice King accidently slammed it on the ground) explaining that they were the true jerks and they deserved to be in jail. Finally, Finn is convinced and decides to let Ice King go. At first Ice King thinks it is a trick, but later decides to go along with it.

Finn and Jake state that since they're the bad guys this time, they have to go to jail. Ice King gets his crown, opens a magic door, and escapes. Princess Bubblegum then walks in to sees Finn and Jake in jail, she gets irritated when Finn tells her that they let Ice King go. The Princess takes the two to the grand hall where they see all the candy people lying in beds embed in ice. Princess Bubblegum explains that Ice King kind of did this and kind of didn't. Ice King had made snow in the Candy Kingdom with his beard and everyone was infected with Freezer Burn Flu. Princess Bubblegum said Ice King didn't mean to cause disease, and she learned that the only way to cure it was to obtain the "sad howls" of Ice King himself. But, when she begged to Ice King to help, he thought she was hitting on him. So she knew the only way to take the Ice King's howls was by force. Finn and Jake then go to the Ice King's Castle to obtain the howls.

When Finn and Jake enter, Ice King comes out and asks if they want to participate in game night, because he now thinks that Finn and Jake are his best friends for letting him go. But when Finn tells Ice King to howl, he says he couldn't possibly howl without giggling. Ice King walks over to Finn and says that there was a bug on him, which in reality was just Jake, only smaller. Ice King hits Finn, wanting him to get the "bug" off. Finn gets an idea on this and pretends he is dead. Showing guilt, Ice King picks up Finn's body and howls extremely loud. His howls reach all the way to the Candy Kingdom, curing all of the inhabitants. Ice King then drops Finn and walks away. Finn says that was a mean thing to do and Jake says that he would carry Finn forever. Finn then plays dead and Jake carries him and wails.

Characters

 * Finn
 * Jake
 * Ice King
 * Princess Bubblegum

Minor characters

 * Lady Rainicorn
 * Candy People
 * Starchy
 * Mr. Cupcake
 * Chocoberry
 * Cinnamon Bun
 * Manfried
 * Penguins
 * Snail

Trivia

 * When Ice King is in his cell, there are only two bars but when Finn and Jake lock themselves in there, the cell has the entire set of cell bars.
 * This episode was released on the Cartoon Network website under the video section a week before it aired on television.
 * There are several more references to Dungeons and Dragons in this episode, namely when Ice King casts "Detect Secret Doors," a classic spell from the game, and Finn saying that keeping the Ice King captive is against his alignment. Alignments were a system used in several editions of Dungeons and Dragons to keep track of a character's morality, such as Good or Evil. The game is also extensively referenced in the episode "Dungeon".
 * When the princess is researching the cure involving the pained howls of the Ice King, the number 5318008 appears on one of the book's pages. Using calculator spelling, that number spells out the word "boobies".
 * At the end, before the princess faints, she says, "Ich bin so glücklich, ich koennte, ich koennte..." which is German for "I am so happy, I could, I could..."
 * Near after the beginning, Princess Bubblegum also says in German: "Ich bin hier, Finn." Translated into English, that means "I'm here, Finn".
 * This episode might be based on the canceled episode "Ice King Has a Point" which it replaced, although it's impossible to be certain, as information about that episode has never been released.
 * Ice King makes a reference to Gunter, telling her to dispose of Finn's carcass (Finn faked his death). However, Gunter did not appear in the episode, although the Guard Penguins did.
 * The game piece Ice King carved with his teeth looked like a background character from Chowder in the episode "Endive's Dirty Secret".
 * Princess Bubblegum truly shows her German side in this episode.
 * PB acts really strange in this episode, when Finn promises to save the candy people, she bursts into tears, which doesn't seem to startle Finn at all, because he simply hushes her.
 * The suit the Princess is wearing is modeled after a beak doctor costume, which was worn during the Black Plague.