When a powerful and dangerous dragon breaks free from its prison beneath the Glass Kingdom, young bookworm Glassboy sets out to find the legendary hero who first defeated the dragon centuries ago: Marceline the Vampire Queen. Marcy, now living in domestic bliss with Princess Bubblegum, is apprehensive about revisiting the Glass Kingdom. It's a place that holds bad memories for her and Bubblegum. With the help of Glassboy and some new friends, Marceline and Princess Bubblegum will have to confront their rocky past as they face off against an ancient foe.
Guest Cast
Jeff Bennett
voices Choose Goose
Jeremy Shada
voices Finn
Dee Bradley Baker
voices Molto Larvo
Tom Kenny
voices Simon Petrikov
Erica Luttrell
voices Elise
Kevin Michael Richardson
voices Sir Soda
Kevin Michael Richardson
voices SmudgeCast Appearances
Hynden Walch
voices Princess BubblegumEpisode Discussion
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