• 
  Nigel Hawthorne

  Walter Monkton (5 episodes, 1978)
• 
  Edward Fox

  King Edward VIII (7 episodes, 1978)
• 
  Ed Devereaux

  Lord Beaverbrook (2 episodes, 1978)
• 
  Jeremy Child

  Piers Leigh (1 episode, 1978)
• 
  Gerald Sim

  Theodore Goddard (2 episodes, 1978)
• 
  Maurice Denham

  Archbishop of Canterbury (2 episodes, 1978)
• 
  John Shrapnel

  Major Alexander Hardinge (5 episodes, 1978)
• 
  Robert Flemyng

  Sir Donald Somervell (2 episodes, 1978)

• 
  Hugh Martin (IV)

  Official (1 episode, 1978)
• 
  Jessie Matthews

  Aunt Bessie Merryman (4 episodes, 1978)
• 
  Bessie Love

  Lady Cunard (1 episode, 1978)
• 
  Geoffrey Lumsden

  Geoffrey Dawson (2 episodes, 1978)
• 
  T.R. Bowen

  Duff Cooper (3 episodes, 1978)
• 
  Cherie Lunghi

  Lady Thelma Furness (1 episode, 1978)
• 
  Peggy Ashcroft

  Queen Mary (5 episodes, 1978)

• 
  Cynthia Harris

  Wallis Warfield Simpson (7 episodes, 1978)
• 
  Patrick Troughton

  Clement Attlee (3 episodes, 1978)
• 
  Terence Rigby

  Stanley Bruce (1 episode, 1978)
• 
  Marius Goring

  King George V (2 episodes, 1978)
• 
  Kika Markham

  Freda Dudley Ward (1 episode, 1978)
• 
  Jeremy Childs

  Piers Leigh (1 episode, 1978)
• 
  Hugh Fraser

  Anthony Eden (2 episodes, 1978)
• 
  Roger Hammond

  Sir Harold Nicolson (1 episode, 1978)
• 
  John Horsley

  Norman Birkett K.C. (1 episode, 1978)
• 
  William Hoyland

  Lord Perry Brownlow (2 episodes, 1978)
• 
  Patricia Hodge

  Lady Diana Cooper (3 episodes, 1978)
• 
  Edward Jewesbury

  Lord Dawson (2 episodes, 1978)