On the hottest night if the year, a huge impromptu summer party in Hyde Park results in chaos. Police come under attack and there is also a vicious stabbing. Homicide and Serious Crime Command hundreds for the suspect.

Gangs are a major problem for police and in Harlesden a long running turf war has had horrific consequences. A young man has been shot, an innocent casualty of a violent gang feud.

In Brixton custody suite a detainee has stripped naked and is refusing to come out of his cell, a 54 year old man has been brought in for threatening the cashier in his local supermarket with a knife.

Homicide detectives investigate the murder of an elderly man in North London. Plus, we follow an undercover operation attempting to cut off the drugs supply in East London, and in West London Police are on the hunt for Ealing's most wanted burglars.