• 
  Sam Bain

  scenarist

• 
  Peter Capaldi

  Malcolm Tucker
• 
  Joanna Scanlan

  Terri Coverley (7 episodes, 2005-2007)
• 
  Chris Addison

  Oliver Reeder
• 
  James McKee Smith

  Glenn Cullen
• 
  Jessica Henwick

  Charlotte
• 
  Georgie Glen

  Susan Dorling (1 episode, 2005)
• 
  James Smith

  Glenn Cullen (8 episodes, 2005-2007)

• 
  Tim Bentinck

  Cliff Lawton (2 episodes, 2005-2007)
• 
  Justin Edwards

  Ben Swain (3 episodes, 2007)
• 
  Morwenna Banks

  Mary (1 episode, 2005)
• 
  Robert Portal

  Mark Davies (1 episode, 2005)
• 
  Alex Macqueen

  Julius Nicholson (3 episodes, 2005-2007)
• 
  Diveen Henry

  Elizabeth (1 episode, 2007)
• 
  Ben Willbond

  Adam Kenyon (2 episodes, 2007)

• 
  Lucinda Raikes

  Angela Heaney (6 episodes, 2005-2007)
• 
  Polly Kemp

  Robyn Murdoch (4 episodes, 2005-2007)
• 
  Roger Allam

  Peter Mannion (2 episodes, 2007)
• 
  Matthew Marsh

  Simon Hewitt (1 episode, 2005)
• 
  Chris Langham

  Hugh Abbot (6 episodes, 2005)
• 
  Olivia Poulet

  Emma Messinger (2 episodes, 2007)
• 
  Vincent Franklin

  Stewart Pearson
• 
  Rebecca Front

  Nicola Murray
• 
  Will Smith

  Phil Smith