All 20 episodes of Adventure Time: Side Quests drop on Disney+ and Hulu in the United States Monday, June 29 — marking the first time in the franchise’s 16-year history that new Adventure Time content has landed on either platform. The show has lived exclusively on Cartoon Network and HBO Max since it premiered in 2010. This is something genuinely new.

The series is developed by Nate Cash and produced by Cartoon Network Studios. It is a prequel set during Finn the Human’s early childhood, before the events of the original Adventure Time, told in the standalone episodic format that defined the show’s early seasons rather than the longer serialized arcs of later entries like Fionna and Cake.

A Younger Finn, the Same Ooo

Because the series is set in Finn’s childhood, actor Sasha Knight voices a younger version of the character — succeeding Jeremy Shada, who voiced the adolescent and adult Finn across the original run and multiple specials. The decision to recast rather than de-age Shada’s voice is consistent with the show treating this as a true prequel rather than a nostalgia clip show.

The rest of the principal cast returns. John DiMaggio is back as Jake the Dog, Tom Kenny as Ice King, Hynden Walch as Princess Bubblegum, Olivia Olson as Marceline, and Niki Yang as BMO. The familiarity of those voices is probably what will settle existing fans into the new episodes within the first five minutes.

What to Expect From the 20-Episode Drop

The simultaneous release of all 20 episodes follows the same strategy Disney+ and Hulu have used for other animated titles where binge viewing is the expected behaviour. Adventure Time’s format — self-contained stories averaging around 11 minutes each — makes this particularly suited to that approach. You can watch three episodes or all 20 in an afternoon.

The show’s tone is lighter and less emotionally serialized than Distant Lands or Fionna and Cake, which leaned into ongoing story arcs and mature themes. Side Quests is closer to the first few seasons of the original: Finn and Jake go somewhere, something weird happens, there is a lesson buried under the weirdness. That is not a criticism — it is what the early Adventure Time was best at, and a generation of viewers will find it exactly what they want.

What Comes Next for the Franchise

HBO Max is separately developing a Bubblegum and Marceline series, which suggests Cartoon Network Studios is treating the Adventure Time universe as an ongoing property rather than a completed one. Side Quests is the first step in that expansion landing on new platforms.

The international premiere follows on Cartoon Network and HBO Max on October 5, 2026. So if you are outside the US, the wait is longer — but the show will eventually reach its audience.

Twenty episodes of Adventure Time dropping Monday. If you grew up with Finn and Jake, that’s all you needed to know.

FYI (keeping you in the loop)

Where can I watch Adventure Time: Side Quests?

All 20 episodes are available starting June 29 on Disney+ and Hulu in the United States. International viewers get access via Cartoon Network and HBO Max from October 5, 2026.