Robert 'Bobby' Libner
Buddy Libner
Marvin Libner
Tammy
Betty Libner
Uncle Phil
Fred Libner
Dr. Sturgeon the Cadillac Surgeon
Rick
Raymond
Billy Sturgeon
Professor Kloppner, Eastbrook Academy
Policeman #1
Policeman #2
Garage Worker
Barney
Garage Worker #2 (as Reid 'Pete' Shook)
Finkelstein
Fishing Buddy
Waitress
Young Bobby
Young Marvin
Young Buddy
(voice)
(voice) (as David McCharon)
Underage Dog Track Gambler (uncredited)
Dog Track Gambler (uncredited)