"The Butterfly and the River" is the fifth episode of the second season of Adventure Time: Fionna & Cake.[1] It is the fifteenth episode overall.
Synopsis[]
After several setbacks, Fionna's quest to save the lot takes a costly turn, while Huntress and Cake begrudgingly join forces to explore an enigmatic vision of the future.
Plot[]
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Characters[]
Major characters[]
- Fionna
- Cake
- Huntress Wizard
- Gary Prince
- Marshall Lee (Human; original version also seen)
Minor characters[]
- Hana Abadeer
- Simone (flashbacks only)
- Damon
- DJ Flame
- Gertie Prince (debut)
- Gordie Prince (debut)
- Nelly Prince (debut; no lines)
- M-Cron (cameo)
- Queenie
- Queenie's thugs (non-speaking cameos for all)
- Simon Petrikov
- Marceline
- Princess Bubblegum
- Finn (no lines)
- Wishy
- Baby Finn
- Spider (Fionna-world Ed; death)
- Peptank (as a talking necklace)
- Marshmallow Kid (debut)
- Biter-flies (debut/deaths for all)
- Tardigrades (debut/cameos for all)
- Worm-like creature (debut/cameo)
- Stanley (cameo)
- Park squirrels (cameos for both)
- Lady in Turtleneck (non-speaking cameo)
- Kid in Puffy Jacket (non-speaking cameo)
- Starchy (Human; non-speaking cameo)
- Beatrice Buttler (non-speaking cameo)
- Honey Vendor (non-speaking cameo)
- Various passersby (debut for some; non-speaking cameos for all)
- Park cats (debut/cameos for all; flashbacks only)
Referenced[]
- Lemoncarbs (pictured in graffiti)
- Jake (pictured in tattoo; partially seen)
- GOLBetty (fountain statue)
- Swan (pedal boat likeness)
- Scarab (pictured/referenced/mentioned)
- BG16 (referenced in writing only)
- The Heart of the Forest (mentioned only)
Places[]
Beyond the Multiverse[]
- Dimensional Tree (mentioned only)
Universes[]
- Fionna-world (non-magical and original versions)
- Hana Abadeer's building
- City Gardens
- Butler's Buttery Buns
- Studio Mellow (debut)
- The Sweet Spot
- Cake's apartment
- Fionna's apartment (mentioned only)
- DJ Flame's old apartment (mentioned only)
- The Towers (debut; exterior only)
- Gary's apartment (debut)
- The Princes' apartment (debut)
- Willow/Tree House
- Tree Timeline Space (debut)
- Land of Ooo
- Wishy's dimension
Trivia[]
- It appears that Baby Finn does not age.
- Gary's family is introduced.
Cultural References[]
- Baby Finn with the needle and Butterfly cape, and the vision featuring the world covered in silk, may be references to the video game, Hollow Knight.
Episode Connections[]
- This episode further demonstrates how Fionna-world was altered by Simon being cured, the effects of which were first seen in "The Lion of Embers".
- Fionna's scream from "Cheers" is heard once again.
- Wishy makes his first reappearance since the original series episode, "Blenanas".
Storyline Analysis[]
TBA
Production Notes[]
- On November 17th, 2025, Warner Brothers Discovery released four preview screenshots on their official website prior to this episode's official release.[2]
- One of the preview screencaps containing Huntress Wizard and Cake was mistakenly included in the previous episode's release.
Errors[]
TBA
Videos[]
Gallery[]
Official art[]
Background art[]





































