Gillian Anderson

as Emily Maitlis

Billie Piper

as Sam McAlister

Rufus Sewell

as Andrew Mountbatten-Windsor

Keeley Hawes

as Amanda Thirsk

Romola Garai

as Esme Wren

Richard Goulding

as Stewart Maclean

Amanda Redman

as Netta McAlister

Connor Swindells

as Jae Donnelly