Cry Wolf
Many shots and bits of equipment in this episode were originally seen in "The Impostors." Even Colonel Jameson was last seen then, appearing as General Lambert.
The prolific and resourceful Barry Gray created the thrilling theme and score for the "Thunderbirds" series and the two theatrical films it spawned.
Bob Williams has a tiny cameo in the next episode, "Danger At Ocean Deep," seen as a small Scottish boy on the River Clyde.
Once again, replica International Rescue uniforms are made by someone who should never have seen one, since no photos of the rescues have been published.
Even little Tony Williams knows the IR creed: International Rescue agents maintain secrecy...and please, no photographs!
Thanks to the talent of Ray Barrett and some skillful puppetry, John's concern for the safety of the children is tangible and touching, made more so by Virgil's teasing him for believing their harrowing tale.
By the time of the movie "Thunderbird 6," Grandma had developed the strange habit of carrying her purse around the house...as if she were going somewhere!
Though normally seen in the kitchen in Tracy Villa, Kyrano's expertise is in horticulture and agriculture as it relates to food preservation methods.
One of the later marionette heads for Scott Tracy had the wrong color of eyes---it had brown eyes, but Scott's eye color is blue.
A set of wires ran through the heads and hats of the uniformed Tracy brothers to enable the crew to "remove" their hats by moving them up the wire and out of sight of the camera.
Jeff's ever-changing moods strikes again: He admits that having Tony and Bob on the island for a visit wouldn't cause any harm, yet he has a raving fit at the boys when the stowaway Chip is found in "Security Hazard."
From the "Curiouser And Curiouser" file: How did the paper get hold of the story about the Williams brothers in remote Charity Springs receiving aid from International Rescue if their father hadn't reported it to anyone?
The tracking satellite station seen in the episode "The Impostors" is used as the stealth satellite searching the Earth in this story.
Lieutenant Langfield at satellite headquarters has made numerous appearances; he was last seen in "The Impostors."
The Hood's desert buggy is as resilient as he is; it turns up again and again, no matter how many cliffs he drives it over.
It's no surprise that Virgil is seen reading a magazine about jazz; that happens to be his favorite type of music, though he loves classical music as well.
Weird science: It is never revealed in the series how The Hood makes his eyes light up in that manner. (Maybe the viewers are all being hypnotized into believing that they do that supernaturally)!
Every so often, a "Britishism" sneaks into the dialog of these American characters. In this episode, John mentions that the boys went in for their "tea," while it would be more common for an American to say "dinner" or "supper."
As with a few of the later episodes, there's a notable absence of the usual reverie during the launch sequences for the ships.
Weird science, too: Wouldn't it be more likely that the blow torch would have set the wallpaper on fire and caused a great deal of damage long before The Hood managed to gain entrance into the next room...?
The now familiar hover-jets are seen again here; they are seen in "City Of Fire," "Attack Of The Alligators" and "Perils Of Penelope" as well.
There's only one natural response to Virgil's line, "11, 18, 32": HIKE!
Scott should have learned to stay away from barns after his quick stint of servitude as a dairy farmer in "Operation: Crashdive!"