A familiar face returns and brings a fun, new piece of technology with her - the polygraph. Nathan freezes when a playful line of questioning catches him off guard.
Roland tries to guide Mia through a breakup while facing his own crumbling relationship and getting roped into celebrating Farty Marty's twelfth birthday.
Dylan Cooper has been nabbed and is being held in the cells at Scotland Yard. His gang wants to spring him out, which will lead to a long night for Blake and new detective George Willows.
