Cast
Annabeth Gish
Tammy
Alan Arkin
Fred Libner
Fred Ornstein
Barney
Arye Gross
Buddy Libner
Rita Taggart
Betty Libner
David McCharen
Additional Voices (voice)
Larry Moss
Additional Voices (voice)
James Gammon
Dr. Sturgeon The Cadillac Surgeon
John Considine
Professor Kloppner, Eastbrook Academy
Patrick Dempsey
Robert 'Bobby' Libner
Edan Gross
Young Bobby
Dean Jacobson
Young Marvin
Daniel Stern
Marvin Libner
Joseph Bologna
Uncle Phil
Terry Loughlin
Gas Station Attendant
Steve Alterman
Additional Voices (voice)
Judi Durand
Additional Voices (voice)
Randy Herman
Dog Track Gambler (uncredited)
Ray Lykins
Rick