Emilia Fox Dr Nikki Alexander Actor David Caves Jack Hodgson Actor Richard Lintern Dr Thomas Chamberlain Actor Liz Carr Clarissa Mullery Actor Michael Landes Matt Garcia Actor Matthew Brenher Ambassador Jonathan Kraft Actor Ako Mitchell Ryan Reed Actor Elliot Levey DCI Ben Solomon Actor Sharon D Clarke Kim Price Actor Selva Rasalingam Assistant Commissioner Khan Actor Jefferson Hall Fergus Weir Actor Alex Reid Inga Meyer Actor Lucy Speed Ella Weir Actor Gretchen Egolf Terry Lefoe Actor Graham Mitchell Writer Kiaran Murray-Smith Producer Diarmuid Goggins Director Richard Stokes Executive Producer