The police are out on the streets of Sun Hill enforcing a crackdown on prostitution. P.C. Stamp nicks an underage tom named Suzanne, and W.P.C. Ackland cautions a would-be punter who mistakes her for a prostitute. An armed robbery at a local building society soon takes precedence. A security guard has been shot and wounded, and Ch. Supt. Brownlow, pending the arrival of PT17, authorises AFOs (Authorised Firearms Officers) Sgt. Cryer and P.C. Stamp to attend. P.C. Quinnan and W.P.C. Marshall locate the fleeing suspects and pursue them into a building site, but they come under fire from the shotgun wielding bandit. Cryer and Stamp arrive, and Cryer shouts a warning, but is forced to shoot and kill the robber (Skene) when he points the shotgun at Quinnan. It it later discovered by the S.O.C.O. that the shotgun was empty. Cryer's colleagues, including the police investigating the shooting are sympathetic and supportive of him, but Cryer seems deeply affected by the fact that he has taken a