• 
  Aran Bell

   Jericho's Father (3 episodes, 2005)
• 
  Peter Bowles

  Fleming
• 
  Kellie Bright

   WPC Penny Collins (4 episodes, 2005)
• 
  Brendan Coyle

  Christie
• 
  Grant Davis

   Grace (2 episodes, 2005)
• 
  Nicholas Jones

  AC Graham Cherry
• 
  Robert Lindsay

  D.I. Michael Jericho
• 
  Eve Matheson

  Rita Harvey

• 
  Ciarán McMenamin

  DC John Caldicott
• 
  Lee Ross

   Louis (4 episodes, 2005)
• 
  David Troughton

  Sgt. Clive Harvey
• 
  Andrew Thorpe

  Young Jericho
• 
  Lydia Leonard

   Angela (4 episodes, 2005)
• 
  Zoe Colton

   Jenny Harvey (3 episodes, 2005)
• 
  Aurélie Bargème

   Juliette (4 episodes, 2005)