Middleman is the 220th episode of The Bill.
D.S. Greig, D.C. Carver and D.C. Lines arrest a man for burglary and possession of drugs. D.I. Burnside recruits him as a snout and Operation Middleman is on. There is animosity between Burnside and D.I. Wray from the Drugs Squad. The operation - to bust a crack house - appears to be a stitch up for both Burnside and the suspects arrested.