Roadkill: Cast Roadkill Thriller 10/18/20 United Kingdom https://www.bbc.co.uk/programmes/p08tfqfs GeneralEpisodesCastCharactersGallery Cast See full cast → Hugh Laurie as Peter Laurence Helen McCrory as Dawn Ellison Sidse Babett Knudsen as Madeleine Halle Saskia Reeves as Helen Laurence Sarah Greene as Charmian Pepper Patricia Hodge as Lady Roche Patricia Hodge as Lady Roche Ophelia Lovibond as Susan Laurence Ophelia Lovibond as Susan Laurence Iain De Caestecker as Duncan Knock Pippa Bennett-Warner as Rochelle Millie Brady as Lily Laurence Shalom Brune-Franklin as Rose Dietl 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
