4 episodesFirst aired 25 June 2020
E1Jun 202045m
BMO travels to a far corner of the galaxy to save its people from a deadly threat.
E2Nov 202045m
Marceline and Princess Bubblegum journey to the imposing, beautiful Glass Kingdom, and deep into their tumultuous past, to prevent an earthshaking catastrophe.
E3May 202146m
Brings Finn and Jake together again, to rediscover their brotherly bond and embark on the most important adventure of their lives.
E4Sept 202150m
Follows Peppermint Butler, starting over at the beginning, as just another inexperienced Wizard School student. When mysterious events at the campus cast suspicion on Pep, and his checkered past, can he master the mystic arts in time?