Thunderbirds Wiki
Thunderbirds Wiki

"Look fellas, if that kid is roaming around the base on his own, dad's gonna go berserk!"
— Scott Tracy

"Security Hazard" is the twenty-sixth episode and season finale of Thunderbirds season 1, first broadcast on 31st March 1966.


While Thunderbird 2 is left unattended during a rescue, a young boy named Chip climbs into the pod - and is taken back to Tracy Island! As Jeff tries to decide what to do with their stowaway, the boys entertain him with stories of their past rescues, thereby exacerbating the breach of security that's already taken place...


Main article: Security Hazard/Storyline


Main article: Security Hazard/Transcript


Regular Characters

Regular Characters (flashback)

Guest Characters

Guest Characters (flashback)

International Rescue Equipment Used

International Rescue Equipment (flashback)

Non-International Rescue Equipment (flashback)




  • Smoke can be seen flowing backwards as Thunderbird 2 reverses into its hangar.
  • Once back inside the hangar, TB2 unloads Pod 1 - but the fonts on the puppet-sized (close-up) and model-scale (long shot) pod doors don't match.
  • The world-globe in Chip's bedroom is upside-down.


  • Not "goofs" per se, but: Alan 's recollection of the events in Sun Probe is rather selective...
  • is Virgil's, of End Of The Road...
  • well as Scott's, of Trapped in the Sky! (And yes, Gordon's too, of Day of Disaster...)
  • Most likely, though, the flashbacks were shortened so as to better synchronize with the new footage and keep within the prescribed length of the episode.
  • While Jeff complains about leaving TB2 unattended, enabling Chip to stow away, youngsters have visited Tracy Island before, with his blessing (the Williams brothers, in Cry Wolf).

Alternate Version

Thunderbirds (FOX Kids Series)


For a contemporary (or at least in the 1990's) audience, Thunderbirds underwent a repackage, redub, and rebroadcast as part of FOX Kids' Saturday morning line-up. Due to a severe decline in ratings, only half of the episodes made it to broadcast before the series was pulled by the network. As a result, the modified version of Security Hazard never aired, and remains among a handful of missing Thunderbirds episodes to this day.

Foreign Titles

  • French: Le rêve
  • German: Das Sicherheitsrisiko
  • Spanish: Peligro de Seguridad; Riesgo de seguridad (DVD)
  • Italian: Una visita inaspettata
  • Dutch: Veiligheidsrisico
  • Portuguese: Uma Falha na Segurança
  • Japanese: 秘密作戦命令