 | John Simm | ... | Cal McCaffrey (6 episodes, 2003) |

| Kelly Macdonald | ... | Della Smith (6 episodes, 2003) |

| Bill Nighy | ... | Cameron Foster (6 episodes, 2003) |
 | Philip Glenister | ... | DCI William Bell (6 episodes, 2003) |

| David Morrissey | ... | Stephen Collins (6 episodes, 2003) |

| James McAvoy | ... | Dan Foster (6 episodes, 2003) |

| Amelia Bullmore | ... | Helen Preger (6 episodes, 2003) |
 | Benedict Wong | ... | Pete Cheng (6 episodes, 2003) |
 | Marc Warren | ... | Dominic Foy (6 episodes, 2003) |
 | Rebekah Staton | ... | Liz (6 episodes, 2003) |
 | Polly Walker | ... | Anne Collins (6 episodes, 2003) |
 | Michael Feast | ... | Andrew Wilson (5 episodes, 2003) |
 | Johann Myers | ... | Sonny Stagg (5 episodes, 2003) |
 | Tom Burke | ... | Syd (4 episodes, 2003) |
 | Maureen Hibbert | ... | Olicia Stagg (4 episodes, 2003) |

| Sean Gilder | ... | Sergeant 'Chewy' Cheweski / ... (3 episodes, 2003) |
 | Shauna Macdonald | ... | Sonia Baker (3 episodes, 2003) |
 | James Laurenson | ... | George Fergus (3 episodes, 2003) |
 | Rebecca Ryan | ... | Karen Collins (3 episodes, 2003) |
 | Charlie Ryan | ... | Louis Collins (3 episodes, 2003) |
 | Deborah Findlay | ... | Greer Thornton (3 episodes, 2003) |
 | Christopher Simpson | ... | Adam Greene (3 episodes, 2003) |
 | Stuart Goodwin | ... | Robert Bingham (3 episodes, 2003) |
 | Madeleine Potter | ... | Professor Tate (2 episodes, 2003) |

| Anthony Flanagan | ... | Young Guy / ... (2 episodes, 2003) |

| Natasha Wightman | ... | Sheena Gough (2 episodes, 2003) |
 | Geraldine James | ... | Yvonne Shaps (2 episodes, 2003) |
 | Carla Du Bois | ... | Hotel Receptionist (2 episodes, 2003) |
 | Elizabeth Elvin | ... | Apex House Receptionist (2 episodes, 2003) |
 | Patrick Brennan | ... | Neil Woods (2 episodes, 2003) |
 | Bruce Lawrence | ... | Jack (2 episodes, 2003) |
|
| Mike Rawlings | .... | props (6 episodes, 2003) |
| Jo Aitchison | .... | stand-by art director (5 episodes, 2003) |
| Graham Bishop | .... | production buyer (5 episodes, 2003) |
| Bunny Burton | .... | painter (5 episodes, 2003) |
| Douglas Glen | .... | stand-by props (5 episodes, 2003) |
| Matthew Power | .... | dressing props (5 episodes, 2003) |
| Mike Power | .... | property master / props master (5 episodes, 2003) |
| Tony Power | .... | stand-by painter (5 episodes, 2003) |
| Charlie Redman | .... | stand-by props (5 episodes, 2003) |
| Brian Rollands | .... | dressing props (5 episodes, 2003) |
| Chris Sibley-Hale | .... | carpenter (5 episodes, 2003) |
| Nick Slater | .... | stand-by carpenter (5 episodes, 2003) |
| Kate Wicks | .... | art department assistant (5 episodes, 2003) |
| Gareth Wilkins | .... | carpenter (5 episodes, 2003) |
| Roger Wilkins | .... | construction manager (5 episodes, 2003) |
| Joe Willmott | .... | carpenter (5 episodes, 2003) |
| Charlie Macher | .... | stand-by rigger (4 episodes, 2003) |
| |
|
| Lee Walpole | .... | foley editor (6 episodes, 2003) |
| Rowena Wilkinson | .... | foley artist (6 episodes, 2003) |
| Stuart Hilliker | .... | dubbing mixer (5 episodes, 2003) |
| Jeremy Lishman | .... | boom operator (5 episodes, 2003) |
| Jamie McPhee | .... | sound effects editor (5 episodes, 2003) |
| Simon Okin | .... | sound mixer (5 episodes, 2003) |
| Adrienne Taylor | .... | sound assistant (5 episodes, 2003) |
| Stan White | .... | adr editor (5 episodes, 2003) |
| Pat Boxshall | .... | dialogue editor (3 episodes, 2003) |
| Jennie Evans | .... | dialogue editor (2 episodes, 2003) |
| Ian Wilkinson | .... | foley recordist (2 episodes, 2003) |
| |
|
| Jeremy Hiles | .... | camera operator (6 episodes, 2003) |
| Chris Williams | .... | camera trainee (6 episodes, 2003) |
| Steve Anthony | .... | best boy (5 episodes, 2003) |
| Dick Conway | .... | electrician (5 episodes, 2003) |
| Steve Ellingworth | .... | camera grip (5 episodes, 2003) |
| Guy Hammond | .... | electrician (5 episodes, 2003) |
| Stuart King | .... | gaffer (5 episodes, 2003) |
| Tom McFarling | .... | clapper loader (5 episodes, 2003) |
| Kim Seber | .... | camera focus puller (5 episodes, 2003) |
| David Wall | .... | electrician (5 episodes, 2003) |
| Paul Worley | .... | second grip (5 episodes, 2003) |
| Mark Funnell | .... | electrician (4 episodes, 2003) |
|
| Joss Barratt | .... | still photographer (unknown episodes) |
| |
|
| Jane Houston | .... | script supervisor / continuity (6 episodes, 2003) |
| Sue Affleck | .... | unit publicist (5 episodes, 2003) |
| Janine Bennett | .... | production secretary (5 episodes, 2003) |
| Heather Bownass | .... | production secretary (5 episodes, 2003) |
| Susie Conklin | .... | script editor (5 episodes, 2003) |
| Wim De Greef | .... | production accountant (5 episodes, 2003) |
| Thomas Elgood | .... | location manager (5 episodes, 2003) |
| Mark Galbraith | .... | production executive: BBC (5 episodes, 2003) |
| Claire Kerrison | .... | production coordinator (5 episodes, 2003) |
| Finlay Pile | .... | location assistant (5 episodes, 2003) |
| Joann Steele | .... | assistant production accountant (5 episodes, 2003) |
| Victoria Brooks | .... | picture publicist (4 episodes, 2003) |
| Simon Hoggart | .... | political advisor (4 episodes, 2003) |
| Norman Lane | .... | journalist advisor (4 episodes, 2003) |
| Kevin Maguire | .... | journalist advisor (4 episodes, 2003) |
|
| Guy Cowan | .... | caterer (unknown episodes) |
| Oliver Kersey | .... | additional set production assistant (unknown episodes) |
| Daigoro Tivers | .... | production runner (unknown episodes) |
| |