Lady & Peebles is the 19th episode of Season 4 of Adventure Time. It first aired August 20, 2012.
The episode starts off with Princess Bubblegum running to an igloo, where Lady Rainicorn is. Lady Rainicorn is worrying about Jake's well being, but Princess Bubblegum reassures her he is fine, because she knows where the two are. Lady Rainicorn is still worried, so Princess Bubblegum rushes the mission to start. The two then enter the mountain. After entering the mountain, the two are attacked by large hands, and barely escape when Lady Rainicorn phases through the wall. The two overhear a conversation between Ice King and what seems to be Finn and Jake, so the two rush through a vent to get to them. However, at the end of the tunnel, there is a wall of eyes, which blast the two with lasers. After the Princess and Lady reawaken from unconsciousness, they walk through the end of the tunnel to not only find Ice King, but Ricardio and Finn and Jake. Ricardio reveals that the entire mountain is his dungeon, and that he was not only after PB's heart, but her entire being. The Princess and Ricardio fight, where PB beats up Ricardio, and Ricardio escapes. Sometime later, Ice King, Lady Rainicorn, Finn, and Jake are in the hospital with Princess Bubblegum. Finn explains what happened, and Ice King starts dancing, shaking the maraca beans now replacing his heart. Princess Bubblegum apologizes to Lady Rainicorn about her condition, and Jake asks what condition. Lady then reveals that she is pregnant with Jake's child.
- It is revealed that Lady Rainicorn is pregnant in this episode.
- It is also revealed that Princess Bubblegum can understand korean