"What an extraordinary man. He didn't even touch his tea!"
— Lady Penelope Creighton-Ward

"Brink of Disaster" is the twenty-second episode of Thunderbirds season 1, first broadcast on 24th February 1966.


A crooked investor called Warren Grafton tries to recruit Lady Penelope into aiding his scheme to build a cross-country monorail. When Penny informs Jeff, he investigates - but he, Brains, Tin-Tin and Grafton find themselves trapped onboard a fully-automated monorail train, speeding towards a stricken bridge.


Main article: Brink of Disaster/Storyline


Main article: Brink of Disaster/Transcript


Regular CharactersEdit

Guest CharactersEdit

Cameo RolesEdit

International Rescue Equipment UsedEdit

Non-International Rescue Equipment UsedEdit



  • The monorail train in this episode uses the same model as the one in The Perils of Penelope. It was constructed by using pieces out of a Meccano bridge set.
  • When Malloy and Selsden break into FAB 1 by smashing the glass, it is unknown how they managed to do it in such a short time. First of all, the transparent roof is a glass-steel canopy, and secondly, it would have taken a very long time to break the glass-steel canopy.


Main article: Brink of Disaster/Goofs

Foreign TitlesEdit

  • French: Le monorail; Arrêtez le train
  • German: Am Rande des Unglücks
  • Spanish: Al Borde del Desastre
  • Italian: Una truffa ben organizzata
  • Dutch: De dodenrit (TV 1967); De laatste redding (TV 1991); Op het randje (VHS, DVD)
  • Japanese: 恐怖のモノレール