One of Our Spies Is Missing

A biochemist develops a process that reverses ageing but, when he disappears, it's up to Napoleon Solo and Ilya Kuryakin to recover or destroy the process before it falls into the hands of the THRUSH.

• 
  E. Darrell Hallenbeck
• 
  Wilbur Mosier

• 
  Robert Vaughn
  Napoleon Solo
• 
  David McCallum
  Illya Kuryakin
• 
  Leo G. Carroll
  Alexander Waverly
• 
  Maurice Evans
  Sir Norman Swickert
• 
  Vera Miles
  Madame Raine De Sala
• 
  Ann Elder
  Joanna Sweet
• 
  Yvonne Craig
  Wanda
• 
  Bernard Fox
  Jordin
• 
  Harry Davis
  Prof. Alexander Gritsky
• 
  Monica Keating
  Olga
• 
  Dolores Faith
  Lorelei Lancer
• 
  Ahna Capri
  Do Do (as Anna Capri)
• 
  Cal Bolder
  Fleeton
• 
  James Doohan
  Phillip Bainbridge
• 
  Ollie O'Toole
  Corvy
• 
  Anthony Eustrel
  Steward
• 
  Richard Peel
  Cat Man
• 
  Barry Bernard
  Pet Shop Owner
• 
  Robert Easton
  Mr. Bentley - the Texan
• 
  Kenner G. Kemp
  Byram Club Member (archive footage) (uncredited)