• 
  Amita Dhiri

   Mrs. Rattigan (2 episodes, 2013)
• 
  Manon Eames

   Gwen Griffiths (2 episodes, 2013)
• 
  Niall Greig Fulton

   Aras Kalvaitis (2 episodes, 2013)
• 
  Jens Hultén

   Lev (2 episodes, 2013)
• 
  Mark Lewis Jones

   DCI Owen Jackson (2 episodes, 2013)
• 
  Anita Reynolds

   Deryn Franklin (2 episodes, 2013)
• 
  Adrian Schiller

   Dr. Price (2 episodes, 2013)
• 
  Jay Simpson

   Jimmy Dawkins (2 episodes, 2013)

• 
  Michael Smiley

   David Penry (2 episodes, 2013)
• 
  Russell Tovey

   DS Huw Brydon (2 episodes, 2013)
• 
  Christine Tremarco

   DC Eluned 'Elli' Jones (2 episodes, 2013)
• 
  Lois Winstone

   Stacey Edwards (2 episodes, 2013)
• 
  Ivana Basic

   Asya Adamkute (2 episodes, 2013)
• 
  Hywel Morgan

   Paul Fletcher (2 episodes, 2013)
• 
  Sophie Rundle

   Fiona Griffiths (2 episodes, 2013)

• 
  Syrus Lowe

   DC Carl Richards (2 episodes, 2013)
• 
  Mufrida Hayes

   Sue Phillips (2 episodes, 2013)
• 
  Richard Tunley

  DCI Matthews