• 
  Michael Gough

  Andrei Zorin
• 
  Andrzej Borkowski

   Doctor (3 episodes, 1991)
• 
  David Calder

  Victor Chekhov
• 
  William Chubb

   George Wetherby (4 episodes, 1991)
• 
  Warren Clarke

  Albert Robinson
• 
  Alan David

  K1
• 
  Richard Durden

  Rev. David Bancroft
• 
  John Flanagan

   Bob Riley (2 episodes, 1991)

• 
  Candida Gubbins

   Alison (4 episodes, 1991)
• 
  Nigel Havers

  Jeremy Coward
• 
  Annie Hulley

   Sandra Robinson (4 episodes, 1991)
• 
  Richard Huw

  Igor Kostov
• 
  Joanna Kanska

   Maj. Nina Grishina (4 episodes, 1991)
• 
  Angus MacInnes

  Bill Sullivan
• 
  Paul Maxwell

   Barrington Cabot (2 episodes, 1991)

• 
  Andrew McCulloch

   Donald (2 episodes, 1991)
• 
  Tara Moohan

   Sharon Robinson (4 episodes, 1991)
• 
  Patrick Moore

   Policeman (2 episodes, 1991)
• 
  Jane Nash

   Serena (4 episodes, 1991)
• 
  Spencer Ridgway

   Wayne Robinson (3 episodes, 1991)
• 
  Ricco Ross

  Karl Richfield
• 
  Christopher Rozycki

   Oleg Petrovski (4 episodes, 1991)
• 
  James Smith

   Roger Stanley (2 episodes, 1991)
• 
  Ian Taylor

   Gary Robinson (3 episodes, 1991)
• 
  Barbara Young

   Elsie (3 episodes, 1991)