Ellie and Hardy realize that the location of the attack and all the surrounding circumstances are going to make this a difficult investigation.

Cast: David Tennant, Olivia Colman, Julie Hesmondhalgh, Georgina Campbell, Chris Mason, Mark Bazeley, Ollie Douglas, Carolyn Pickles, Mariah Gale, Jodie Whittaker, Charlie Higson, Hannah Rae, Sebastian Armesto, Andrew Buchan, Arthur Darvill