Anna Maxwell Martin as Kay Langrish

Claire Foy as Helen Giniver

Jodie Whittaker as Vivian Pearce

Anna Wilson-Jones as Julia Standing

Harry Treadaway as Duncan Pearce

JJ Feild as Robert Fraser

Liam Garrigan as Reggie Nigri

Claudie Blakley as Nancy Carmichael

Kenneth Cranham as Horace Mundy

Jenna Augen as Iris Knight

Neal Barry as Mr Bryant

Lucy Briers as Binkie

Richard Cambridge as Policeman

Chas Early as Prisoner #1

Richard Huw as James Imrie

Caitlin Innes Edwards as O'Neil

Phill Langhorne as Cyclist

Colin Mace as Hughes

Stephen Matthews as Auntie Vi

Paul Ritter as Mr Pearce

Kris Saddler as Airman

Alex Waldmann as Alec Jennings

Leona Walker as Orderly

Phoebe Waller-Bridge as Lauren

Tom Weston-Jones as Jack Brown