Filmography
| Year | Title | Role | Notes |
|---|---|---|---|
| 1989 | Wilt | Davz | |
| 1989 | Ending Up | Dr. Mainwaring | Made-for-television film |
| 1989 | The fairy queen (La reine des fées) | Oberon | Made-for-television film |
| 1990 | The Investigation: Inside a Terrorist Bombing | Charles Tremayne | Made-for-television film |
| 1992 | Shakespeare: The Animated Tales | Duke Orsino / Narrator (voice) | Television mini series; episodes The Winter's Tale and Twelfth Night |
| 1994 | Screen Two | Stephen Summerchild | Television series; episode A Landing on the Sun |
| 1998 | Heartbeat | Graham Hayes | Television series; episode Echoes of the Past |
| 1997 | Inspector Morse | Denis Cornford | Television series; episode Death Is Now My Neighbour |
| 1998 | The Creatives | Charlie Baxter | Television series |
| 1998 | Midsomer Murders | Alan Hollingsworth | Television series; episode Faithful unto Death |
| 1999 | RKO 281 | Walt Disney | Made-for-television film |
| 2002 | Foyle's War | Alastair Graeme | Television series; episode Eagle Day |
| 2003 | Strangers | Eric | Short film |
| 2003 | The Roman Spring of Mrs. Stone | Christopher | Made-for-television film |
| 2005 | A Cock and Bull Story | Adrian | |
| 2005 | The Inspector Lynley Mysteries | Simon Featherstonehaugh | Television series; episode The Seed of Cunning |
| 2006 | The Wind That Shakes the Barley | Sir John Hamilton | |
| 2006 | The Queen | Robin Janvrin | |
| 2006 | V for Vendetta | Lewis Prothero | |
| 2007 - 2012 | The Thick of It | Peter Mannion | Television series |
| 2006 | Spooks | Paul Millington | Television series |
| 2008 | Speed Racer | E.P. Arnold Royalton | |
| 2008 | The Curse of Steptoe | Tom Sloane | Made-for-television film |
| 2009 | The Old Guys | Ned | Television series; episode The Therapist |
| 2009 | Margaret | John Wakeham | Made-for-television film |
| 2009 | Kröd Mändoon and the Flaming Sword of Fire | General Arcadius | Television series |
| 2009 | Ashes to Ashes | Detective Superintendent Mackintosh | Television series |
| 2010 | Tamara Drewe | Nicholas Hardiment | |
| 2011 | Game of Thrones | Magister Illyrio Mopatis | Television series |
| 2011 | Pirates of the Caribbean: On Stranger Tides | Henry Pelham, Prime Minister of Great Britain | Box Office Movie |
| 2011 | The Iron Lady | Gordon Reece | |
| 2012 | Endeavour | Chief Inspector Fred Thursday | Television film |
| 2012 | The Woman in Black | Mr Bentley | |
| 2012 | Parade's End | General Campion | Television series |
| 2012 | The Angels' Share | Thaddeus |
Read more about this topic: Roger Allam