BMO narrates "The Great Gum War" in which Finn, Jake, Marceline, PB and the Candy Kingdom go to war against Gumbald and his army that will determine the fate of Ooo once and for all.
Jeremy Shada
Finn the Human (voice)
John DiMaggio
Jake the Dog/Banana Guards/Additional Voices (voice)
Hynden Walch
Princess Bubblegum (voice)
Tom Kenny
Ice King/Simon Petrikov/Gunter/Ice Thing/King Man/Gumbal Guardian #1 (voice)
Olivia Olson
Marceline (voice)
Niki Yang
BMO/Lady Rainicorn (voice)
Pendleton Ward
Lumpy Space Princess/Shelby/Banana Guards (voice)
Fred Melamed
Gumbald/Punch Bowl (voice)
Hayden Ezzy
Fern/Grass Demon (voice)
Justin Roiland
Earl of Lemongrab (voice)
Sean Giambrone
Shermy (voice)
Willow Smith
Beth (voice)
Tom Scharpling
Jermaine (voice)
Maria Bamford
Aunt Lolly/Slime Princess (voice)
Felicia Day
Betty Grof (voice)
Jessica DiCicco
Flame Princess (voice)
Andy Milonakis
N.E.P.T.R (voice)
Dee Bradley Baker
Cinnamon Bun (voice)
Diana Lafyatis
Director
Cole Sanchez
Tom Herpich
Writer
Steve Wolfhard
Somvilay Xayaphone
Kim Hee-jung
Aleks Sennwald
Hanna K. Nyström
Sandra Lee
Art Direction
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