• 
  Michael Gambon

  Egbert Elvesham
• 
  Ray Winstone

   H. G. Wells (4 episodes, 2016)
• 
  Brid Brennan

  Nurse
• 
  Amelda Brown

  Hapley's Housekeeper
• 
  Leticia Dolera

  St Catherine
• 
  Graham Duff

  Doctor
• 
  Johnny Flynn

  Alec Harringay
• 
  Tom Goodman-Hill

  Father Morton

• 
  Rupert Graves

  Dr. Hapley
• 
  Mercedes Grower

  Jennie
• 
  Shaun Parkes

  James Coombes
• 
  Paul Putner

  Harris
• 
  Antonia Thomas

  Isabel Harringay
• 
  Luke Treadaway

  Edward Eden
• 
  James Wilby

  Professor Pawkins

• 
  Stewart Wright

  Clarence Clint
• 
  Camilla Marie Beeput

  Young Woman
• 
  Leanne Best

  Eveline Coombes