Michael Moriarty as David 'Mo' Rutherford

Andrea Marcovicci as Nicole Kendall

Garrett Morris as 'Chocolate Chip' Charlie W. Hobbs

Paul Sorvino as Colonel Malcolm Grommett Spears

Scott Bloom as Jason

Danny Aiello as Vickers

Patrick O'Neal as Fletcher

James Dixon as Postman

Alexander Scourby as Evans

Russell Nype as Richards

Gene O'Neill as Scientist

Catherine Schultz as Waitress

James Dukas as Gas Attendant

Peter Hock as Miner

Brian Bloom as Jason's Brother

Ann Dane as Hostess

Rutanya Alda as Psychologist

Adrianne Sachs as Studio Aide

Nicolas De Toth as Griswald

Brooke Adams as Stuff Commercial Spokeswoman

Laurene Landon as Stuff Commercial Spokeswoman

Tammy Grimes as Stuff Commercial Spokeswoman

Abe Vigoda as Stuff Commercial Spokesman

Clara Peller as Stuff Commercial Spokeswoman

Eric Bogosian as Supermarket Clerk (uncredited)

Brad Rijn as Supermarket Clerk (uncredited)

Patrick Dempsey as Underground Stuff Buyer (uncredited)

Mira Sorvino as Factory Worker (uncredited)

John Newton as Howard

Robert Frank Telfer as Jason's father

Colette Blonigan as Jason's mother

Heidi Miller as Girl in Franchise