Channel 4's true crime drama based on a dangerous, high profile honey trap. Starring eddie marsan. The thrilling crime drama examines the controversial honeytrap at the heart of the high pressure investigation into the devastating murder of rachel nickell in 1992. Five months on from the brutal murder of rachel nickell on wimbledon common and the met police are still no closer to capturing the man they're convinced is responsible. First identified through a television appeal, the evidence is stacked against colin stagg. The police are determined to catch the man who, in their eyes, is guilty before he kills again. In desperation, the relatively young detective inspector leading the case, engages the nation's most famous criminal profiler to devise a bold undercover operation which will see an attractive, young female officer start a relationship with colin stagg.