• 
  Vicky McClure

  4 episodes, 2018
• 
  Derek Riddell

  4 episodes, 2018
• 
  Jim Howick

  Graham
• 
  Magnus Samuelsson

  2 episodes, 2018
• 
  Laura Checkley

  Monica
• 
  Amy Beth Hayes

  3 episodes, 2018
• 
  Wolfgang Cerny

  2 episodes, 2018
• 
  Tom Davis

  Logan Mann

• 
  Charlie Rawes

  4 episodes, 2018
• 
  Kayode Ewumi

  Huxley
• 
  Brooke Conroy

  4 episodes, 2018
• 
  Thomas Arnold

   MI5 Tech
• 
  Raj Awasti

  Kevin
• 
  Gabriella Wright

  Rebekkah Volk
• 
  Jordan Jacques Aboutboul

  San Miguel

• 
  Yasmine Akram

  Gemma Stone
• 
  Terence Anderson

  African Warlord
• 
  Helena Antonio

  Italian newsreader
• 
  Stephen Graham

  Gavril
• 
  Rob Delaney

  Victor
• 
  Stephen Campbell Moore

  Agent 49
• 
  Chris Hayward

  Agent 104