The movie tells the true story of a British whistleblower Katharine Gun (Keira Knightley), who leaked information to the press about an illegal NSA spy operation designed to push the UN Security Council into sanctioning the 2003 invasion of Iraq.

Official Secrets is directed by Gavin Hood (X-Men Origins: Wolverine, Ender's Game) and the cast includes Keira Knightley, Matthew Goode, Conleth Hill, Indira Varma, Ralph Fiennes, Matt Smith, Rhys Ifans, Shaun Dooley and Jeremy Northam.

Official Secrets can be seen on HBO as follows: Sunday, October 11, at 02:05 and Monday, October 12, at 22:15.