• 
  Natalie Dormer

  Niamh Cranitch
• 
  Jessica Henwick

  Amy Lang
• 
  Indira Varma

  George Duggan
• 
  Shazad Latif

  Ibrahim Ali
• 
  Otto Farrant

  Harry Stephens
• 
  Frances Barber

   Caroline Warwick QC (12 episodes, 2012-2014)
• 
  Alex Jennings

  Alan Cowdrey QC
• 
  Maxine Peake

  Martha Costello QC

• 
  Rupert Penry-Jones

  Clive Reader
• 
  Neil Stuke

  Billy Lamb
• 
  John Macmillan

  John Bright
• 
  Amy Wren

   Bethany Brassington (12 episodes, 2012-2014)
• 
  Theo Barklem-Biggs

  Jake Milner
• 
  Phil Davis

  Micky Joy
• 
  Tom Hughes

  Nick Slade

• 
  Nina Sosanya

  Kate Brockman
• 
  Miranda Raison

  Harriet Hammond
• 
  Jamie Dispirito

  Jimmy
• 
  Kirsty Bushell

  Nicola
• 
  Shanaya Rafaat

  Fatima Ali