When a babysitter is murdered and a dangerous patient and former Whitechapel resident escapes from a psychiatric unit, the area is hit by a series of terrifying events. Fearing that a spree killer is on the loose, Chandler, Miles and the team must act fast to prevent more deaths. Meanwhile, Chandler's quest to bring in a suspect alive jeopardises his relationship with Miles.

• Ben Court
• Caroline Ip

• Steve Pemberton
• Phil Davis
• Alex Jennings