This award-winning chilling supernatural drama returns from it's highly successful first series with eight compelling new episodes featuring an all-star cast plus a behind-the-scenes documentary. In the terrifying and emotional climax to the first series, Alison (Lesley Sharp) collapsed and nearly died during a seance in which she was inhabited by the spirit of Robert's dead son. Now on the road to recovery, Alison has had to accept that the spirits she has seen since she was a child will never leave her. Determined that her life should be dictated by the dead, she wants to usher gift to help the living, resolving relationships torn apart by death. Robert (Andrew Lincoln) meanwhile is in turmoil. Once a total sceptic, his beliefs have been shaken by he witnessed at the seance and he now struggles to make senses of his life. Desperate for answers, he turns to Alison for help. But she is now deeply disturbed by a terrifying presence. For the first time in her life Alison is being haunted by a spirit from her own past, a ghost she must learn to confront if she is to hold on her sanity.