One of the Met's most experienced officers leads his team on a pursuit through London to intercept a car suspected of carrying a gun. Detectives Hitesh Patel and Paul Connelly, officers on Trident, the Met's specialist gang unit, work undercover in Harlesden to take down as many gang members as possible to stop the drug trade thriving on the streets of north west London. And the Met Commissioner, Sir Bernard Hogan-Howe, visits Islington and is confronted by the grieving family of Henry Hicks.