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"My, this is a deserted area. One just wouldn't know where one was, would one?"
— "Gayle Williams"

"The Man From MI.5" is the seventeenth episode of Thunderbirds season 1, first broadcast on the 20th of January 1966.


The British government asks for International Rescue's help in locating the missing blueprints for an atomic weapon. Whilst tracking the culprits, IR agent Lady Penelope (posing as model Gayle Williams) is kidnapped and held aboard a bomb-rigged boat. Scott and Gordon have very little time to locate and rescue her, and steal back the plans...before the bomb explodes, and the villains escape...


Main article: The Man From MI.5/Storyline


Main article: The Man From MI.5/Transcript


Regular Characters

Guest Characters

Cameo Roles

Crowd Scenes

International Rescue Equipment Used

Non-International Rescue Equipment Used



Brains' model submarine

  • This episode features the first full Thunderbird 4 launch sequence, shown from inside Pod 4. (Prior to this, TB4 had only been seen emerging down the ramp outside the pod door.)
  • It's also the only occasion wherein Thunderbird 2 gently rests Pod 4 upon the surface of the water (rather than dropping it in), and then rises clear with its lifting jets.
  • The backdrop used for the harbour scenes also appears in the opening scene of The Duchess Assignment, in the Captain Scarlet and the Mysterons episode Model Spy, and in the Joe 90 episode The Race.

Monte Carlo harbour in "Captain Scarlet"

  • When broadcast in the half-hour "cliffhanger" format, Part One concluded with Carl taking off in his boat, with Penelope as his prisoner, from FAB 2.


Main article: The Man From MI.5/Goofs

Foreign Titles

  • French: L'homme du M I5
  • German: Der Mann vom M.I.5
  • Spanish: El Hombre del MI.5; El agente MI5 (DVD)
  • Italian: S.O.S. Servizi Segreti Britannici
  • Dutch: De geheime agent (TV); De man van MI. 5 (VHS, DVD)
  • Portuguese: O Homem do M.I.5
  • Japanese: 情報員MI. 5