In this instalment, police negotiator Inspector Emma Brookes races to reach a suicidal man threatening to jump from a roof forty miles away. Can Biggers get her there on time in one of the Evos? Meanwhile, Andy chases a suspected drug dealer, Emily catches a drink-driver and one of the Evos comes a cropper on the A12. Elsewhere this week, the Air Support Unit tracks a fugitive car thief, and a man is caught with a van of stolen clothes. Finally, Grant discovers the future of British pop music - in Brentwood.