Craig T. Nelson
Dr. Simon Chase

Kim Cattrall
Dr. Amanda Mayson

Colm Feore
Adm. Aaron Richland

Cress Williams
Tall Man

Michael Reilly Burke
Adam Puckett

Michael Michele
Tauna

Matthew Carey
Maxwell Bishop

Megalyn Echikunwoke
Elizabeth

Blu Mankuma
Rollie Gibson

John Aylward
Ben Madiera

Giancarlo Esposito
Lt. Thomas Peniston / Werewolf

Gary Reineke
Dr. Ernest Bishop

Toi Svane Stepp
Kyrstyn

Steve Makaj
SEAL Leader Taylor

Jill Teed
SEAL Gray

Rob Daprocida
SEAL Ochoa

Rick Ravanello
SEAL Nash

Warren Takeuchi
SEAL York

Colin Lawrence
Communications Officer

Brian Steele
Creature

Antoni Corone
Exec

Peter Benchley
Exec's Buddy