|Season 1, Episode 9|
|Air date||May 17, 2010|
|Written by||Bert Youn & Sean Jimenez|
|Directed by||Larry Liechliter|
City of Thieves
Finn and Jake are in the Tree Fort while Jake is telling Finn stories about vampires. After the story, Jake says that Finn is scared and he leaves the bedroom. Finn sees an odd figure in his window and screams. He runs down stairs to tell Jake what happened but then the window opens and both become frightened. Then they find Marceline the Vampire Queen in their house.
- This marks the first appearance of Marceline.
- Although the Ice King has no dialogue, he makes a brief appearance in this episode.
- Even though Jake tried to scare Finn at the beginning of the episode with a vampire story, Jake is actually the one who is scared of vampires.
- This is the first episode to have a song with the time of it more than 2 minutes.
- Despite the fact that in this episode Tree Trunks died in the episode of the same name, she is seen in this episode.