Hugh Laurie Peter Laurence Actor Helen McCrory Dawn Ellison Actor Sarah Greene Charmian Pepper Actor Pip Torrens Joe Lapidus Actor Patricia Hodge Lady Roche Actor Iain De Caestecker Duncan Knock Actor Pippa Bennett-Warner Rochelle Actor Millie Brady Lily Laurence Actor Saskia Reeves Helen Laurence Actor Olivia Vinall Julia Roche Actor Sidse Babett Knudsen Madeleine Halle Actor Danny Ashok Luke Strand Actor Gbemisola Ikumelo Steff Frost Actor Shalom Brune-Franklin Rose Dietl Actor Emma Cunniffe Syndey Actor Natalie Dew Alisha Burman Actor Anna Francolini HJ Keane Actor Jennifer Hennessy Bryony Beckett Actor Kate Lamb Lindsay Storm Actor Katie Leung Margaret Moore Actor Tony Pitts Mick Murray Actor Nicholas Rowe Adam De Banzie Actor Alice McMillan Charlotte Hedge Actor Yolanda Kettle Joy Pelling Actor David Hare Writer, Executive Producer Michael Keillor Director Andrew Litvin Producer George Faber Executive Producer Mark Pybus Executive Producer Lucy Richer Executive Producer Dominic Strevens Film Editor Wojciech Szepel Cinematographer