Season 1

Adventure Time: Fionna and Cake (2023), Season 1 is the ten-episode spin-off you can watch online on iFILM. Fionna and her cat Cake drift through a world with no magic in it — until Simon Petrikov, the man once known as the Ice King, drops back into their lives and cracks the ordinary wide open.

The season runs one continuous arc across the multiverse. Cake crash-lands somewhere fantastic, Fionna witnesses the impossible, and Prismo pulls the three of them together to explain how their fates are tied. From there it's a hunt for a magical artifact through lawless territory, a detour into the Winter Kingdom and its tempting "fix," a crew of vampire hunters, and a wasteland that only releases them after a desperate gamble. Trailing the whole way is a new foe set on erasing them from existence.

It plays older and sadder than the parent show — as much about self-discovery and Simon's demons as about fights and gags. Longtime fans get familiar faces like Marshall Lee; newcomers get a fantasy that stands on its own. Stream all episodes of Fionna and Cake Season 1 online on iFILM.