Cal

Dr. David Downey

Winston Wellesley

Carl Reddick

Brigham Young

Zho'Kaan

Brother Blood (voice)

Peter Thompson

Prosecutor (uncredited)

Col. Robert Marr

Pete Fox

Dr. Arthur Strauss

Russell Fabray

Sam Bouchard

Jack MacReady

Detective John Felkner

Richard Webb

Shiff

Lt. Terri

Thom Dower

Pete Lukins

Robert Gant / Agent Clark