• 
  Hugh Bonneville

  Ian Fletcher
• 
  Amelia Bullmore

  Kay Hope
• 
  Jessica Hynes

  Siobhan Sharpe
• 
  Vincent Franklin

  Nick Jowett
• 
  David Tennant

   Narrator (13 episodes, 2011-2012)
• 
  Morven Christie

  Fi Healey
• 
  Olivia Colman

  Sally Owen
• 
  Karl Theobald

  Graham Hitchins

• 
  Alex Beckett

  Barney Lumsden
• 
  Samuel Barnett

  Daniel Stroud
• 
  Sara Pascoe

  Coco Lomax
• 
  Joel Fry

  Karl Marx
• 
  Sebastian Coe

  Sebastian Coe
• 
  Simon Wilson

  TV Reporter - Sam
• 
  Lucy Briers

  Anna Mitchell

• 
  Rebecca Sarker

  TV Reporter
• 
  Bentley Kalu

  CIA
• 
  Jimmy Akingbola

  Receptionist