Silent Witness: Falling Angels, Part 1

Nikki and Jack investigate when a man is run down and killed by a Tube train - although not long after, a female vicar is murdered on the Underground, leaving them with the difficult prospect of building a case against her distraught husband. However, when a young roofer is stalked and brutally killed on his journey home, CCTV cameras pick up a suspect who links the deaths, and a full-scale manhunt is launched. Meanwhile, Nikki forms a bond with one of the detectives, who asks her to help re-evaluate his father's murder when he was a child. First in a two-part story, starring Emilia Fox, David Caves and Richard Lintern