• 
  Roger Beckett

  scenarist

• 
  Rachael Blake

  Hilary Davenport
• 
  Amelia Bullmore

  Joyce Hazledine
• 
  Lucy Robinson

  Pam Draper
• 
  Simon Kassianides

  Dimitri (1 episode, 2007)
• 
  Adrian Schiller

  Dr Lumb (1 episode, 2007)
• 
  Ruth Wilson

  Jewel Diamond (11 episodes, 2006-2007)
• 
  Tom Hiddleston

  Bill Hazledine  (11 episodes, 2006-2007)

• 
  Nicholas Farrell

  Raymond  (5 episodes, 2006-2007)
• 
  Ralph Ineson

  Jeremy Hazledine (11 episodes, 2006-2007)
• 
  Jenny Howe

  Felicity the Librarian (1 episode, 2006)
• 
  Anna Chancellor

  Camilla Diamond (12 episodes, 2006-2007)
• 
  Jake Canuso

  Yuri (1 episode, 2007)
• 
  Cathryn Bradshaw

  Margaret Littlefair (11 episodes, 2006-2007)
• 
  Cathryn Bradshaw

   Margaret Littlefair (11 episodes, 2006-2007)

• 
  Tom Ellis

  P.C. Haines
• 
  Emma Kennedy

   Lillian Gordon-Moore (11 episodes, 2006-2007)
• 
  Felicity Montagu

   Barbara Du Prez / ... (11 episodes, 2006-2007)
• 
  Andrew Scarborough

   Stuart / ... (6 episodes, 2006-2007)