Natalie Dormer as Lady Seymour Worsley

Aneurin Barnard as Captain George Bisset

Shaun Evans as Sir Richard Worsley

Peter Sullivan as Mr. James Farrar

Jessica Gunning as Mary Sotheby

Robert Morgan as Hesse

Alex Beckett as Captain Leversuch

Michael Bott as Dr. Osborn

Oliver Chris as Viscount Deerhurst

Richard McCabe as Lord North

Craig Parkinson as Mr Wallace, QC

David Calder as Lord Chief Justice Mansfield

Sandra Huggett as Mary Marriott

Elizabeth Rider as Elizabeth Figg

Rose Shalloo as Hannah Commander

Scarlett Brookes as Ann Ekelso