Part One - Lifelines: Hagen realises she is running out of friends at Sun Hill when Clarke and Rickman decide to go on a girls' night out without her. As she and Stamp investigate the mugging of pensioner Archie Dodds, who has had his wallet taken by a youth, her impatience begins to get the better of her, and she reprimands Stamp for not driving fast enough. When the mugger is spotted assaulting another pensioner, Stamp and Hagen set off in pursuit. However, when Stamp stops to help the victim, the suspect manages to escape. Hagen, out of spite, then invites herself to the girls' night out, and quickly picks up a date in the club. As she takes him home to Page's flat, disaster strikes. (thetvdb.com)