• 
  Joe Ahearne

  regizor

• 
  Joe Ahearne

  scenarist

• 
  Jack Davenport

  Detective Sergeant Michael Colefield
• 
  Neil Maskell

  Neil (1 episode, 1998)
• 
  Stephen Moyer

  Jack Beresford (2 episodes, 1998)
• 
  Susannah Harker

  Dr. Angela 'Angie' March (6 episodes, 1998)
• 
  Richard Rees

  Embryologist (1 episode, 1998)
• 
  Corin Redgrave

  Dr. Paul Hoyle aka 'John Doe' (segments "Terra Incognita", "Persona Non Grata") (unknown episodes)

• 
  T.R. Bowen

  Gideon Hammond (1 episode, 1998)
• 
  Dennis Banks

  Orderly (1 episode, 1998)
• 
  Colette Brown

  Kirsty Maine (6 episodes, 1998)
• 
  Christopher Villiers

  Lester Hammond  (1 episode, 1998)
• 
  Jimmy Gallagher

  Mugger #2 (1 episode, 1998)
• 
  Philip Quast

  Father Pearse J. Harman (4 episodes, 1998)
• 
  Thomas Lockyer

  Journalist Jacob Keanault (4 episodes, 1998)

• 
  Idris Elba

  Vaughan Rice  (6 episodes, 1998)
• 
  John Ashton

  DS Paul Ferman (1 episode, 1998)