Rollebesetning

• Keira Knightley — Katharine Gun
• Matt Smith — Martin Bright
• Ralph Fiennes — Ben Emmerson
• Rhys Ifans — Ed Vulliamy
• Tamsin Greig — Elizabeth Wilmshurst
• Conleth Hill — Roger Alton
• Kenneth Cranham — Judge Hyam
• Chris Larkin — Nigel Jones
• John Heffernan — James Welch
• Matthew Goode — Peter Beaumont
• Indira Varma — Shami Chakrabarti
• MyAnna Buring — Jasmine
• Hattie Morahan — Yvonne Ridley
• Ray Panthaki — Kamal Ahmed
• Shaun Dooley — John