Cayt Feinics
— May
Joel D. Wynkoop
— Niven
Sophie Godin
— Lab Assistant / Young Niven
Dustin Hubbard
— Dr. Howard Phillips
Mary Catherine Holseybrook Wynkoop
— Katherine
Todd Sheets
— Ben
Giovanni Lombardo Radice
— Narrator (voice)
Briana Wyman
— Nikki
Kii Hornick
— Brian
Toby Johansen
— Lycanimator- Phase 2
Matthew Scott Kimple
— Lycanimator- Phase 1
Karina Nieves
— Allie
Jonathan E. Smith
— Jeff
Alberto Giovannelli
— Officer Tony Berto
Jeff Strand
— Dr. Creighton
B.A. Johnston
— Ed Crafton
Michael O'Hear
— Dr. Kroft (voice)
Jed Rowen
— Sheriff Winston (voice)
James Balsamo
— Will Wilkerson (voice)
Mark Borchardt
— Spencer Del Graves
Anthony Polonia
— Drew (uncredited)