Guest Stars Daisy Edgar-Jones as Olivia Marsden Ceallach Spellman as Matthew Williams Sylvie Briggs as Ellie Marsden Madeleine Edmondson as Chloe Gifford Jack Harper as Adam Gifford Marji Campi as Barbara Blyth Yemisi Oyinloye as Amber Jay Rincon as Patrick Michelle Holmes as Mary Harvey Chaisty as Youth Hollie-Jay Bowes as Sophie Stacey Evans as Quizmaster