A neighborhood is terrorized by group of young juvenile delinquents called The WolfPack. When a young father's infant child is seriously injured because of the WolfPack, he decides that the police aren't working fast enough to catch the ones who hurt his baby and sets out to infiltrate the gang himself and mete out the punishment they deserve.
| Actor | Role |
|---|---|
 Frank LovejoyPolice Capt. Tom Lynn | Police Capt. Tom Lynn |
 Keefe BrasselleSam Bennett aka Bill Holland | Sam Bennett aka Bill Holland |
 Cathy O'DonnellAnne Bennett | Anne Bennett |
 Karen SharpeTess | Tess |
 Stanley ClementsMarty aka Ignatz | Marty aka Ignatz |
 Paul BryarMatt, Police Detective | Matt, Police Detective |
 Paul DubovJamie Allison | Jamie Allison |
| JJames DelgadoFrank | Frank |
 Joe TurkelPete Johnson (as Joseph Turkel) | Pete Johnson (as Joseph Turkel) |
 Aaron SpellingWillie Hanson | Willie Hanson |
 Terence de MarneyPop (as Terence DeMarny) | Pop (as Terence DeMarny) |
| EEstes KefauverHimself, Pre-Title Prologue (as Senator Estes Kefauver) | Himself, Pre-Title Prologue (as Senator Estes Kefauver) |
 Maidie NormanMiss Lovett | Miss Lovett |
 Joe BesserGas Station Attendant | Gas Station Attendant |
| RRobert StevensonTV News Broadcaster (uncredited) | TV News Broadcaster (uncredited) |