One Bad Turn is the 668th episode of The Bill
Following complaints from residents, Ch. Insp. Cato instigates a clampdown on prostitution. W.P.C. Datta and P.C. Loxton are patrolling 9 beat and will be taking Ch. Insp. Cato out later. They put out signs and caution kerb crawlers. They arrest a prostitute and caution a punter. The prostitute reveals that the punter is a drug dealer. The prostitute is later found beaten in an alley. P.C.s Quinnan and Jarvis are also patrolling the area and removing prostitutes' cards from 'phone boxes. They talk to one of the prostitutes. Driving around Quinnan spots a man wanted for jumping bail but loses him in the market.