Stephen and Celeste try to rebuild their shattered lives.But Daniel's world turns to terror when Viktor has to flee from Kiev, and Daniel uses his birthday party at Muriel's to reveal his dangerous plan to family and friends.Rosie loses her job, while Edith's former life as an activist calls her back into action on a secret mission.

Cast: Emma Thompson, Russell Tovey, Maxim Baldry, Jessica Hynes, Rory Kinnear, Ruth Madeley, T'Nia Miller, Anne Reid, Sharon Duncan-Brewster, Jade Alleyne, Lydia West, Julie Peasgood, Zita Sattar, Andrew Byron, Craig Gazey