The episode to feature the largest cast of characters (in speaking roles) seen in any single "Thunderbirds" episode or either of the feature films with 20 voices provided by all of the cast members from the second season (Jeremy Wilkin had replaced David Holliday as the voice of Virgil at this time), featuring Paul Maxwell as Captain Ashton, although he was not credited in the end titles.
One of François's creations is named "Alligator Attack", possibly named after the episode of a similar name.
One of the few times Brains (Mr. Hackenbacker) is seen without eye wear, if only for a moment.
All things espionage were in vogue at the time of this episode, and micro-transmitters were shown in all manner of situations, as seen here.
Industrial espionage can be just as cut throat and dangerous as any other spy scenario. The fashion world is particularly notorious for the stealing of designs between rival couturiers.