Security Hazard is the 26th produced, and broadcast, episode - and the first-season finale - of the British television series Thunderbirds.
Thunderbirds 1 and 2 return to Tracy Island from their latest rescue - only to discover an impulsive young stowaway, Chip Morrison, in TB2's cargo pod! International Rescue's security is now at risk - and the Tracys are initially at a loss as to what to do...
- This episode is a so-called "clip show," consisting of stock footage from previous episodes (including Trapped In The Sky, Day Of Disaster, Sun Probe and End Of The Road), linked by newly-filmed material.
Security Hazard on Thunderbirds Wiki: