• 
  Bradley James

  Webb Sherman / Keegan Sherman
• 
  Sheila Atim
• 
  Rosie Perez

   Nina (1 episode, 2017)
• 
  Amber Agar

   Suleiman (1 episode, 2017)
• 
  Jack Whitehall

   Barnaby (1 episode, 2017)
• 
  Christian Ochoa

   Angel (1 episode, 2017)
• 
  Miguel Ángel Luque

   Taliban soldier (1 episode, 2017)
• 
  Jackson Kai

   Camera operator (1 episode, 2017)

• 
  Nigel Betts

  2 episodes, 2017
• 
  Daniel Faraldo

  4 episodes, 2017
• 
  Corey Johnson

  2 episodes, 2017
• 
  Jacqueline King

  2 episodes, 2017
• 
  Robert Lindsay

  4 episodes, 2017
• 
  Olga Merediz

  5 episodes, 2017
• 
  Sophie Thompson

  5 episodes, 2017

• 
  Gordon Alexander

  3 episodes, 2017
• 
  Youssef Kerkour

  3 episodes, 2017
• 
  Charity Wakefield

  6 episodes, 2017
• 
  Gloria Garayua

  2 episodes, 2017
• 
  Elsa Mollien

  2 episodes, 2017
• 
  Doc Brown

  5 episodes, 2017
• 
  Pablo Verdejo

  2 episodes, 2017
• 
  G-Rod

  5 episodes, 2017
• 
  Daniella Piper

  5 episodes, 2017
• 
  Mark Field

  2 episodes, 2017
• 
  Ian Gerard Whyte

  2 episodes, 2017-2018