5. Riot City

Ch. Insp. Conway and a team of Sun Hill officers undergo riot simulation training at the Met's training depot in Hounslow. Meanwhile, DC Glaze goes undercover at the Cockroft Estate to gather evidence of dealing in stolen goods, but discovers more than he bargains for when he discovers two rival familes battling for control of the estate, and which may be stockpiling petrol bombs and weapons for a showdown.