Tom Sutcliffe looks at both the reality of police life and its portrayal. The playwright Roy Williams's latest drama is set in a police station in Kingston, Jamaica, revealing a world of corruption and intrigue. TV writer Sam Bain, of Peep Show fame, talks about Babylon, a drama which take a wry look at modern policing. The former police officer Christian Plowman explains what life was like undercover, and the criminologist Jennifer Brown looks back at the history of policing in the UK.