• 
  Barry Evans

  Michael Upton
• 
  Robin Nedwell

  Dr. Duncan Waring
• 
  Dudley Sutton

  Smith (1 episode, 1970)
• 
  Ralph Michael

  The Dean (7 episodes, 1969-1970)
• 
  Guy Slater

  Young Examiner (1 episode, 1970)
• 
  Jonathan Lynn

  Danny Hooley (9 episodes, 1970)
• 
  Donald Bisset

  Dr. Merriford (2 episodes, 1970)
• 
  Lucy Griffiths

  Fourth Old Lady (1 episode, 1970)

• 
  Julia Foster

  Alice (1 episode, 1969)
• 
  Wally Patch

  Second Old Man (1 episode, 1970)
• 
  Andrew Jack

  Smoothie (1 episode, 1969)
• 
  Ernest Clark

  Professor Geoffrey Loftus (15 episodes, 1969-1970)
• 
  Nicholas Smith

  Mortuary Keeper (1 episode, 1970)
• 
  Kurt Christian

  Patel (1 episode, 1969)
• 
  Michael Grady

  Fourth Medic  (3 episodes, 1969)

• 
  Noel Hood

  Miss Egerton (1 episode, 1969)
• 
  Martin Shaw

  Huw Evans (10 episodes, 1969)
• 
  James Beck

  Mr. Wale (1 episode, 1970)
• 
  Jonathan Cecil

  Mungo Ludlake (1 episode, 1969)
• 
  Susan George

  Jenny (1 episode, 1970)
• 
  David N. White

  Mr. Drobnic (1 episode, 1970)
• 
  Bernard Bresslaw

  Malcolm (1 episode, 1969)
• 
  Graham Ashley

  First Police Sergeant (1 episode, 1969)
• 
  Angela Scoular

  Fiona (1 episode, 1969)
• 
  David Jason

  Mr. Drobnic (1 episode, 1970)
• 
  Edna Doré

  First Woman Server (1 episode, 1969)
• 
  Neville Phillips

  Barry (1 episode, 1969)
• 
  Arnold Diamond

  Bishop Briddock (1 episode, 1970)
• 
  Jan Rossini

  Rita (1 episode, 1970)
• 
  Simon Cuff

  Dave Briddock
• 
  Geoffrey Davies

  Dick Stuart-Clark
• 
  George Layton

  Paul Collier