• 
  Matt Lipsey

  regizor

• 
  Steven Moffat

  scenarist

• 
  James Nesbitt

  Dr. Tom Jackman
• 
  Gina Bellman

  Claire Jackman
• 
  Denis Lawson

  Peter Syme
• 
  Michelle Ryan

  Katherine Reimer
• 
  Meera Syal

  Miranda
• 
  Fenella Woolgar

  Min

• 
  Amanda Hale

  Sally
• 
  Graham McTavish

  Gavin Hardcastle (1 episode, 2007)
• 
  Gemma Baker

  Billy's Girlfriend (1 episode, 2007)
• 
  Bruce Mackinnon

  Malcolm (4 episodes, 2007)
• 
  Matthew Ashforde

  Delivery Man (1 episode, 2007)
• 
  Matt King

  Freeman (5 episodes, 2007)
• 
  Sid Mitchell

  Billy (1 episode, 2007)

• 
  Stephanie Langton

  Karen (1 episode, 2006-2007)
• 
  Belinda Stewart-Wilson

  Nicki (1 episode, 2007)
• 
  Linda Marlowe

  Ms. Utterson  (5 episodes, 2007)
• 
  Cliff Barry

  Security Man (1 episode, 2007)
• 
  Sophie Stanton

  Mother (1 episode, 2007)
• 
  Paterson Joseph

  Benjamin (4 episodes, 2007)
• 
  Ian Cairns

  Poole (1 episode, 2007)
• 
  Tallulah Sheffield

  Pretty Girl (1 episode, 2007)
• 
  Leo Bill

  Dave (1 episode, 2007)
• 
  Malcolm Storry

  Colonel Hart (3 episodes, 2007)
• 
  Joanna Scanlan

  Nurse (1 episode, 2007)
• 
  Mark Gatiss

  Robert Louis Stevenson (1 episode, 2007)