Main Characters Tommy Gavin 93 main appearances Sean Garrity 93 main appearances Lt. Kenneth "Lou" Shea 93 main appearances Franco Rivera 93 main appearances Mike Silletti 93 main appearances Sheila O'Keefe 91 main appearances Janet Gavin 85 main appearances Jimmy O'Keefe 39 main appearances Chief Jerry Reilly Johnny Gavin Laura Miles
Recurring Guest Characters Colleen Gavin 9 guest appearances Dwight 5 guest appearances Little Girl 1 guest appearances