Return of the Hunter - S17.E25

Sgt. Cryer and PC Hayward attend an incident at a local school where an angry divorcee, Chris Finnessey, is demanding to see his son. When the boy's teacher warns the police of Finnessey's violent reputation and a possible restraining order against him, he grabs a Stanley knife and takes the teacher and Sgt. Cryer hostage. Faced with an armed suspect and two hostages, Supt. Chandler calls in SO19, although the only Trojan unit available is that of the newly-qualified PC Smith and PC Stanley. When Finnessey and his son leave the school building, Chandler gives authorisation to fire. Smith shoots first but to his horror, accidentally hits Cryer. Stanley takes down Finnessey. Cryer survives the shooting, but his career in the police is over.