A deadly space emergency in the farthest reaches of the galaxy finds Sheriff BMO and Deputy Y5 rushing against the clock to save the day.

Marceline and Princess Bubblegum journey to the imposing, beautiful Glass Kingdom and deep into their tumultuous past, to prevent an earthshaking catastrophe.

Finn and Jake reunite to rediscover their brotherly bond and embark on the most important adventure of their lives.

Peppermint Butler is just another inexperienced Wizard School student when mysterious events at the campus cast suspicion on him and his checkered past.