Emilia Fox Nikki Alexander Actor David Caves Jack Hodgson Actor Liz Carr Clarissa Mullery Actor Richard Lintern Dr Thomas Chamberlain Actor Phil Cheadle Conrad Devenish Guest Star Micah Balfour Daniel Garvey Guest Star Thomas Aldridge Sergeant Ross Guest Star Robin Berry Mark Guest Star Leon Ajikawo Nunn Guest Star Lovelace Akpojaro Dickson Balogun Guest Star Claudie Blakley Louise Marsh Guest Star James Alexandrou Carl Parry Guest Star Heather Coombs Underground Manager Guest Star Savana Davis Lucy Parks Guest Star Martin Campbell Alain Gontrard Guest Star Lorraine Burroughs DI Gina Conroy Guest Star Richard Cook Kolya Bazhanov Guest Star Robert Mountford Jamal Jennings Guest Star Pauline Cadell Delores Patrick Guest Star Steven Elder Mark Stone Guest Star Laura Mackie Executive Producer Jessica Pope Executive Producer Phillippa Giles Executive Producer Graham Mitchell Writer Timothy Prager Writer Ed Whitmore Writer Craig Viveiros Director Matthew Arlidge Writer Tom Butterworth Writer Daniel O'Hara Director David Richards Director Chris Hurford Writer Marek Losey Director David Drury Director