When a teenager, who has been haunted by a young boy, claims a psychic he visits is an impostor, Alison tries to sort things out. However, she find that on this occasion, she can't contact the spirit world. Robert still hasn't told Alison of his tumour, but will he ever get the chance, before it's too late?

• Stephen Volk

• Nikki Amuka-Bird
• Andrew Lincoln
• Harry Treadaway