- as The Master (Voice)
- as Dr. Ephraim "Eph" Goodweather
- as Professor Abraham Setrakian
- as Mariela Martinez
- as Dr. Nora Martinez
- as Abraham's Grandmother
- as Reggie Fitzwilliam
- as Jack Noon
- as Joan Luss
- as Dr. Everett Barnes
- as Ruby Wain
- as Ann-Marie Barbour
- as Ansel Barbour
- as Abraham (Young Setrakian)
- as Neeva
- as Jacob Setrakian
- as Dr. Morse
- as Trip Taylor
- as Dr. Evanston
- as Ms. Byrne
- as Vasiliy Fet
- as Eldritch Palmer
- as Thomas Eichorst
- as Jim Kent
- as Gabriel Bolivar
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