Karen Allen
Alex Bristow
Armand Assante
Mark Mathias
Josh Mostel
Mel Gorsky
Holly Hunter
Coral Grable
Richard Libertini
Doctor Parrish
Jon Shear
Tyler Forbes (as Jon Matthews)
Nan Martin
Mrs. Norton
Crystal Buda
Cleo Grable
Ivan Bonar
Dr. Ridley
Vivian Warfield
Blaze De Teo
Janni Brenn
Mrs. Parrish
Steven Kent Foster
Nerd
Cynthia Vance
Co-Ed
Joyce Brothers
Visiting Psychologist (as Dr. Joyce Brothers)
Alice Drummond
Site Committee
Al Jones
Site Committee
Peter Prouse
Site Committee
Alexa Kenin
Sheila Sandusky
Dan J.P. Ciernia
Student (uncredited)
Mike the Chimpanzee
Himself