Adventure Time Season 6 Episode 21 Dentist Episode Title:Dentist.Episode Description:When Finn's toothache gets too much to take, he has no choice but to visit the ants, led by General Tarsal (voiced by Lucy Lawless), who provide dental care in exchange for a tour of duty. However, Finn soon finds himself partnered up with Tiffany (voiced by Collin Dean), who constantly tries to kill him so that he may become Jake's best friend. Finn and Tiffany attempt to defend an underground intersection from aggressive worms. Just when victory is assured, Tiffany tries to kill Finn, but accidentally falls into the maw of the Queen Worm, to his apparent demise. Following this ordeal, Finn's teeth are promptly fixed.