Emilia Fox Nikki Alexander Actor David Caves Jack Hodgson Actor Liz Carr Clarissa Mullery Actor Richard Lintern Dr Thomas Chamberlain Actor Michael Socha David Bennetto Guest Star Tobias Menzies Greg Walker Guest Star Mark Tandy QC Harry Fraser Guest Star Chanel Cresswell Jill Bond Guest Star Sharon Bloom Producer Phillippa Giles Executive Producer Daniel O'Hara Director Timothy Prager Writer Graham Mitchell Writer David Richards Director