Jacqui Honess-Martin Creator, Writer, Executive Producer Lara Pulver Catherine Macdiarmid Actor Parminder Nagra Maryam Afridi Actor Lisa McGrillis Helen Cavendish Actor Haydn Gwynne Anne Macdiarmid Actor Matilda Ziegler Becky Hillford Actor Oliver Chris Guy Cavendish Actor Raza Jaffrey Jack Oliviera Actor Sabina Arthur Kim Allerton Actor Alexander Karim Lars Nördstrom Actor Aurora Jones Maggie Cavendish Actor Harts Mr. Williams Actor Cleo Sylvestre Mrs. Osei Actor Stephanie Jacob Mrs. Smith Actor Abhin Galeya Raz Farooqi Actor Shaheen Khan Sania Masoom Actor Dean Ridge Simon Segman Actor Julie Graham Susan Fisher Actor William Ladd Skinner Will Actor Betsan Morris Evans Producer James Griffiths Director, Executive Producer Emilie Levienaise-Farrouch Original Music Kathryn Pugsley Executive Producer Patrick Spence Executive Producer