C. Thomas Howell as Mark Watson

Rae Dawn Chong as Sarah Walker

Arye Gross as Gordon Bloomfeld

James Earl Jones as Professor Banks

Melora Hardin as Whitney Dunbar

Leslie Nielsen as Mr. Dunbar

Ann Walker as Mrs. Dunbar

James B. Sikking as Bill Watson

Max Wright as Dr. Aronson

Jeff Altman as Ray McGrady

Julia Louis-Dreyfus as Lisa Stimson

Maree Cheatham as Dorothy Watson

Wallace Langham as Barky Brewer

Eric Schiff as Booey Fraser

Ron Reagan as Frank

Mark Neely as Brad Small

David Reynolds as Ernie

Wolfe Perry as Leon

Jerry Pavlon as Bruce Wizansky

Laurel Green as Zendel

John David Bland as Seth

Jonathan 'Fudge' Leonard as George Walker

Felix Nelson as Mr. Walker

Betty Cole as Mrs. Walker

Bo Mancuso as Bundy Dunbar

Donald Hotton as Mr. Wicher

Linda Hoy as Mrs. Sherwood

Robert Burleigh as Bouchard Man

Jonathan Wise as Andrew

Amy Stoch as Kim

Paul O'Brien as Officer Schkolnick

M.C. Gainey as Jail Cell Bigot

Freddie Dawson as D.J.