• 
  Alfie Allen

  Nobby Clark
• 
  Nicholas Farrell

  Sydney Holland
• 
  William Houston

  Dr. Millais Culpin
• 
  Neil Fitzmaurice

  Thomas Hooley
• 
  Jack Chissick

  Joseph Levy
• 
  Alan Gaunt

   Watcher (2 episodes, 2008)
• 
  Michael Jenn

  Dr Koch
• 
  Dominic Jephcott

  Bedford Fenwick

• 
  Cherie Lunghi

  Matron Eva Luckes
• 
  Andrew Readman

  Ernest Morris
• 
  Hywel Simons

  Dr Lawes
• 
  Sarah Smart

  Ada Russell
• 
  Adam Sopp

  Frank Gorman
• 
  Alan Stocks

  Gould
• 
  David Troughton

  Hurry Fenwick

• 
  Greg Wood

  Docker
• 
  Charity Wakefield

  Ethel Bennett
• 
  Will Keen

  Dr James Sequeira
• 
  Lydia Leonard

  Laura Goodley
• 
  Tom Riley

  Dr James Walton
• 
  Daniel Lusardi

  Oliver Blaine
• 
  Youkti Patel

  Corisande Veveers