Adventure Time Season 8 Episode 4 - Lady Rainicorn of the Crystal Dimension Episode Title:Lady Rainicorn of the Crystal Dimension.Episode Description:Jake's son TV (voiced by Dan Mintz) finds a hidden box containing a crystal sandwich. After eating it, TV draws attention from a Rainicorn named Lee (voiced by Bert Youn). Prior to her having arrived in Ooo, Lady Rainicorn had originally been in a relationship with Lee while living in the Crystal Dimension. Lee was adamantly anti-dog, and his increasingly radical and violent tendencies caused Lady to flee. In the present, it is revealed that the crystal sandwich is some sort of doomsday weapon, and only the combined efforts of Lady and TV are able to stop Lee from activating it and unleashing its power.