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Cast for season 16, episode 52 "Doppleganger"

Part One: A terrified young woman, Emma Roberts, fears that she has become the victim of a stalker when paint is thrown over her car and her cat is killed in mysterious circumstances. After spending a night at her house, Hagen is convinced that she is making the entire story up for attention, and refuses to believe her. When Emma makes a claim of rape against her boss Brian Woods, Page investigates the case, and she finds that she too is being drawn into a nightmare world of unseen terror. Part Two: As her friendship with stalker victim Emma Roberts develops, Page is determined to find the stalker and starts to believe that he might be closer than she thought. After going out to dinner with Dave and Jenny, Emma arrives home to find her house has been broken into, and Page grows a little too close for comfort by inviting her to stay the night. When a past allegation made against Woods comes to light, Emma decides to press charges. Woods is released on bail, but soon turns up and tries to force his way into her house. He is subsequently arrested again and remanded in custody. Meanwhile, Polly is spooked when she starts receiving nuisance calls and a strange bunch of flowers are delivered to her. Suspecting she may have become the victim of the stalker, she looks to Emma to find comfort, but little does she know that her stalker is much closer to home than she imagined. Part Three: Page learns what it is like to be a victim of crime as the crazed stalker targets her further, making more nuisance calls, breaking into her flat and tearing up her clothes. Lennox and Glaze focus their investigation on Brian Woods, and discover he had an intriguing visitor in prison. Lennox is convinced that Woods is not the man responsible for the stalking, but Polly isn't so sure. As her suspicions turn to intrigue, Polly lets herself into Emma's house and finds a number of her missing photos that were stolen during the break in, but turns up a surprise lead when she finds Gina Reynolds lurking in the garden. Little does she know that Emma is not only her stalker, but she has a mad plan to prove to Polly she loves her – by getting Jenny Quinnan away from Dave, leading Emma to take horrifying action.

Roger Walker guest stars

Helen Caldwell guest stars

Helen Caldwell guest stars

Helen Caldwell guest stars

Helen Caldwell guest stars

Helen Caldwell guest stars

Season 16 index | <<< S16E51 "Time to Kill" | S16E53 "Lullaby: Part 1" >>>