There's been another murder in Successville. This week D.I. Sleet is joined by Spice Girl Emma Bunton, who takes on the role of his cop sidekick in this weird and wonderful world of improvised comedy. Ourdetectives learn that James May, a cop from North Successville, has been murdered. The duo head out of the city to help hunt for the cop killer. May's police partner Jeremy Clarkson explains the details of the crime, while Sleet takes a shine to Chief of Police Nigella Lawson.