David Tennant Tony Baddingham Actor Oliver Chris James Vereker Actor Katherine Parkinson Lizzie Vereker Actor Alex Hassell Rupert Campbell-Black Actor Victoria Smurfit Maud O'Hara Actor Luke Pasqualino Basil `Bas' Baddingham Actor Danny Dyer Freddie Jones Actor Lisa McGrillis Valerie Jones Actor Wendy Albiston Mrs Makepiece Actor Emily Atack Sarah Stratton Actor Milo Callaghan Seb Burrows Actor Catriona Chandler Caitlin O'Hara Actor Bryony Hannah Deirdre Kilpatrick Actor Rufus Jones Paul Stratton Actor Georgia Mack Sharon Jones Actor Bella Maclean Taggie O'Hara Actor Lara Peake Daysee Butler Actor Claire Rushbrook Lady Monica Baddingham Actor Aidan Turner Declan O'Hara Actor Nafessa Williams Cameron Cook Actor Dominic Treadwell-Collins Executive Producer, Writer Alexander Lamb Executive Producer Elliot Hegarty Director Dee Koppang O'Leary Director Alexandra Brodski Director Laura Wade Writer Sophie Goodhart Writer Kefi Chadwick Writer Marek Horn Writer Mimi Hare Writer Dare Aiyegbayo Writer Clare Naylor Writer