Dee Wallace (Karen White)
Patrick Macnee (Dr. George Waggner)
Dennis Dugan (Chris)
Christopher Stone (R. William "Bill" Neill)
Belinda Balaski (Terry Fisher)
Forrest J. Ackerman (Bookstore Customer (Uncredited))
Meshach Taylor (Shantz)
Roger Corman (Man in Phone (uncredited))
John Moio (Stunt Player)
John Sayles (Morgue Attendant (Uncredited))
Marneen Fields (Stunt Player)
Wendell Wright (Man at Bar)
Bill Sorrells (Kline)
Robert Picardo (Eddie)
Michael O'Dwyer (Drunk)
Sarina Grant (Hooker)
James MacKrell
Dick Miller (Walter Paisley)
Chico Martinez (Man on Street)
Bruce Barbour (Stunt Player)
Margie Impert (Donna)
Noble Willingham (Charlie Barton)
James Murtaugh (Jerry Warren)
Jim McKrell (Lew Landers)
Kenneth Tobey (Older Cop)
Don McLeod (T.C.)
Steve Nevil (Young Cop)
Herb Braha
Joe Bratcher (Radio Man)
Kevin McCarthy (Fred Francis)
John Carradine (Erle Kenton)
Slim Pickens (Sam Newfield)
Elisabeth Brooks (Marsha)