An attack on an elderly man gives the police a new lead in the Grove Park case. Fearing he may have seen her on the night of the murder, Marcella searches for the taxi driver who was outside Grace's house.
Stars: Anna Friel, Nicholas Pinnock, Andrew Lancel
Director(s): Jonathan Teplitzky
Writer(s): Hans Rosenfeldt, Nicola Larder, Marston Bloom