Hugh Laurie
as Peter Laurence
Helen McCrory
as Dawn Ellison
Sidse Babett Knudsen
as Madeleine Halle
Iain De Caestecker
as Duncan Knock
Pippa Bennett-Warner
as Rochelle
Millie Brady
as Lily Laurence
Shalom Brune-Franklin
as Rose Dietl
Tony Pitts
as Mick 'the Mouth' Murray
Saskia Reeves
as Helen Laurence
Pip Torrens
as Joe Lapidus
Gbemisola Ikumelo
as Steff Frost
Katie Leung
as Margaret Moore
Nicholas Rowe
as Adam De Banzie
Sylvestra Le Touzel
as Dame Vanessa Pollard
Sarah Greene
as Charmian Pepper
Patricia Hodge
as Lady Roche
Guy Henry
as Trevor Quinn
Ophelia Lovibond
as Susan Laurence