Ben Affleck

Sheriff Bryce Hammond

Peter O'Toole

Dr. Timothy Flyte

Rose McGowan

Lisa Pailey

Joanna Going

Jennifer Pailey, M.D.

Liev Schreiber

Deputy Stuart 'Stu' Wargle

Nicky Katt

Deputy Steve Shanning

Clifton Powell

Gen. Leland Copperfield

Rick Otto

Scientist Lockland

周嘉玲

Scientist Yamaguchi

Adam Nelson

Scientist Burke

John Hammil

Scientist Talbot

John Scott Clough

Scientist Shane

Michael DeLorenzo

Soldier Velazquez

Bo Hopkins

Agent Hawthorne

Robert Knepper

Agent Wilson

Dean Hallo

Sgt. Harker

Clive Rosengren

Commanding Officer

Luke Eberl

Tunnel Boy

Judith Drake

Hilda

Yvette Nipar

Cowgirl

Lonny Chapman

Old Man at Bar (uncredited)

Linnea Quigley

Woman in Room 204 (uncredited)