John Stockwell as Michael Harlan

Danielle von Zerneck as Ellie Sawyer

Fisher Stevens as Vince Latello

Raphael Sbarge as Sherman

Richard Masur as Detective Isadore Nulty

Barry Corbin as Lew Harlan

Ann Wedgeworth as Dolores

Dennis Hopper as Bob Roberts

Candace Silvers as Irene

Beau Dremann as Matusky

Pat Simmons as Crystal

John Vidor as Jock #1

Vincent Barbour as Jock #2

Jaime Alba as Jock #3

Robert Beer as President Eisenhower

John Carter as General

Cameron Young as General's Aide

Noel Conlon as Secret Service Man

Jackson Bostwick as Sentry

Robert DoQui as Desk Sergeant

Elven Havard as Fireman

Linda Hoy as Librarian

Robin Allyn as Ellie's Friend

Michael Berryman as Mutant #1

Chuck Hemingway as Coy

Pamela Springsteen as Hall Monitor Ellie's Friend

Matt Hoelscher as Preppie

Jack O'Leary as Sentry at Air Force Guardhouse

Clare Peck as Policewoman

Joel Harrison as Wino

Ann Culotta as Trucker's Wife

Hank Calia as Neanderthal Man

Scott Bailey Spangler as Guard #2 at Air Force Guardhouse

Frank Welker as Alien (voice)

Dawna Lee Heising as Sorceress (uncredited)

Al Leong as Vietnamese Soldier (uncredited)

Gerald Okamura as Vietnamese Soldier (uncredited)