- Niki Yang - BMO / Additional Voices (voice)
- Niki Yang - BMO / Football (voice)
- Hynden Walch - Princess Bubblegum / Additional Voices (voice)
- Hynden Walch - Princess Bubblegum (voice)
- John DiMaggio - Jake / Additional Voices (voice)
- John DiMaggio - Jake (voice)
- Jeremy Shada - Finn / Additional Voices (voice)
- Jeremy Shada - Finn (voice)
- Tom Kenny - Ice King / Simon Petrikov / Additional Voices (voice)
- Tom Kenny - Simon Petrikov (voice)
- Tom Kenny - Y5's Dad (voice)
- Ashly Burch - Darling (voice)
- John Hodgman - Shafter (voice)
- Randall Park - Hugo (voice)
- Stephen Root - Mr. M / Bob (voice)
- Dee Bradley Baker - Centipede / Crab (voice)
- Dee Bradley Baker - Molto Larvo (voice)
- Cole Sanchez - Cole / Lenny Longlegs (voice)
- Michelle Wong - KS-2 (voice)
- Olivia Olson - Marceline (voice)
- Michaela Dietz - Glassboy (voice)
- Audrey Bennett - Young Marceline (voice)
- Jeff Bennett - Limeston / Choose Goose (voice)
- Erica Luttrell - Elise (voice)
- Charlotte Nicdao - See-Thru Princess / Ancient Glass Princess (voice)
- Maria Bamford - Margaret (voice)
- Maria Bamford - Sandy (voice)
- Kevin Michael Richardson - Sir Soda / Smudge (voice)
- Aryan Simhadri - Tiffany Oiler (voice)
- Chris Fleming - New Death (voice)
- Kent Osborne - Joshua (voice)
- Ron Perlman - The Lich (voice)
- Steve Little - Peppermint Butler (voice) / Abracadaniel (voice)
- Chloe Coleman - Cadebra (voice)
- Bex Taylor-Klaus - Blaine (voice)
- Bill Hader - Bufo (voice)
- Toks Olagundoye - Dr. Caledonius (voice)
- John Omohundro - Spader (voice)
- Adam Muto
Ron Perlman hace el papel de The Lich (voice).
John DiMaggio hace el papel de Jake / Additional Voices (voice).
Jeremy Shada hace el papel de Finn / Additional Voices (voice).
Tom Kenny hace el papel de Ice King / Simon Petrikov / Additional Voices (voice).
Hynden Walch hace el papel de Princess Bubblegum / Additional Voices (voice).
Niki Yang interpreta a BMO / Additional Voices (voice) en la serie.
Capítulo disponible en las siguientes plataformas:
