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