Police authorities in London, after investigating the Fireflash sabotage, found that the international gang, Benton Aircraft Espionage were responsible.
The saboteur was voiced by Ray Barrett.
- The saboteur's inflatable dinghy was previously seen in the "Stingray" episode The Ghost of the Sea; it later reappeared in the "Joe 90" episode Big Fish.
- The puppet used for the saboteur is the same one that played Jenkins in The Impostors, Kenyon in 30 Minutes After Noon, a Gray and Housman Construction Co. worker in End Of The Road, and the 2nd Site Control Policeman in Terror In New York City. On top of all that, it also appeared as a diner at the Wistle Stop Inn in the movie Thunderbird 6