Michael Sarrazin

as Frank Bryant

as Prof. Nelson Zarcoff

as Dr. Robert Trask

as Lt. Colonel Douglas Murphy

as Smith

as Craig

as Craig

as Bert Sanders

as Kevin Hornby

as Vince Morelli

as Brandon

as Mark Miller

as Michael Bannon (Cobra Team)

as Peter Proud

as The Creature

as Pete Robbins

as Ray Haulihan

as John David Welles / Peter Bellamy

as Leland 'Lee' Stamper

as William Popper

as Robert Syverton

as Wylie

as Miller Nalls

as Jess Washburn

as Curley

as Cord Decker