With SW5 member (and fellow undercover cop) Clarke tied up in the backroom of SW6 HQ, Pat needs to come up with a rescue plan, stat. But when he leaks Clarke's whereabouts to SW5 gang leader Janet (Natalie Cassidy), existing tensions between the two gangs begin to escalate. Meanwhile, on the comedy circuit, there's another terrible crime to deal with - a blatant case of material theft...