Big Mouth

The Great Unknown

Directed by Henrique Jardim
TV-MA
S8 • E10    May 22, 2025    32m
8.3
As the kids creep closer to adulthood, a memorable finale takes them back to where it all began to say goodbye — and face the future.

Where to Watch The Great Unknown

Cast of The Great Unknown

  • Nick KrollNick Birch / Maury the Hormone Monster / Coach Steve (voice) / Writer
  • John MulaneyAndrew Glouberman (voice)
  • Jessi KleinJessi Glaser (voice)
  • Jason MantzoukasJay Bilzerian (voice)
  • Maya RudolphDiane Birch / Constance the Hormone Monstress (voice)
  • Fred ArmisenElliot Birch (voice)
  • Jordan PeeleGhost of Duke Ellington (voice)
  • Chelsea Peretti
  • Maria Bamford
  • Jessica Chaffin
  • Gary Cole
  • Andrew Rannells
  • Paula Pell
  • Thandiwe Newton
  • June Diane Raphael
  • Joe Wengert
  • Nathan Fillion
  • Gil Ozeri
  • Seth Morris
  • Richard Kind
  • Henrique JardimDirector
  • Andrew GoldbergWriter
  • Jennifer FlackettWriter
  • Mark LevinWriter
  • Kelsey CressmanProducer
  • Abe Forman-GreenwaldProducer
  • Nate FunaroProducer

 

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