Trivia: Jeff Tracy's five sons were named after Mercury astronauts - Scott Carpenter, Virgil Grissom, Alan Shephard, Gordon Cooper and John Glenn.

Trivia: Although he is the main villain, the Hood appears in only six episodes throughout the entire series.

Terror in New York City - S1-E13

Trivia: When Thunderbird 1 touches down to land in New York City, look at the centre of the screen and you can see a brown building with a giant Swastika on it.

Season 2 generally

Trivia: There were a lot of changes to the show throughout the second season. Not only was Virgil "re-cast" with both a new head and voice actor (Jeremy Wilkin), but smaller, more lifelike puppet hands were crafted on the marionettes, and the inside of Tracy Island and the Thunderbird crafts were completely redone.

Atlantic Inferno - S2-E1

Trivia: This is the only episode in which we see anyone other than Scott piloting Thunderbird 1, namely Alan.

Edge of Impact - S1-E16

Trivia: When General Bron speaks to the Hood by radio after he crashes his van into the river, his voice sounds like an Aquaphibian from "Stingray".

Ricochet - S2-E5

Trivia: At the end of this episode, we hear the song 'Flying High', which was one of the songs considered as the show's theme tune before the famous march. The song was performed by Gary Miller, who sang 'Aqua Marina' during the closing credits of 'Stingray'.

Trivia: Fenella Fielding was Gerry Anderson's first choice for the voice of Lady Penelope.

Security Hazard - S1-E26

Trivia: When Virgil places the asleep Chip into his own bed towards the end of the episode, look behind Virgil and you can see a WASP Arrowhead Fighter Model from "Stingray" on the shelf by the window.

Trapped in the Sky - S1-E1

Trivia: The shot of the third elevator car swerving out of control was initially filmed by accident. Derek Meddings (Special Effects Director) liked the shot so much that he convinced Gerry Anderson to write the scene into the episode.

Give or Take a Million - S2-E6

Trivia: Despite the large number of characters, Matt Zimmerman's voice is only heard once in the entire episode, when Alan says "F.A.B." during the Thunderbird 3 launch sequence.

Trivia: The Hood's name was never used in the TV series. It was revealed in spin-off media and promotional materials.

The Perils Of Penelope - S1-E12

Trivia: When the violinist is playing next to the table that Alan, Lady Penelope and Sir Jeremy Hodge are sitting at the cafe in Paris towards the end of the episode, look behind Lady Penelope and you can see Camp from the episode "Sun Probe."

Give or Take a Million - S2-E6

Trivia: This is the only episode in which International Rescue does not save anyone from life-threatening danger, and the only episode where Lady Penelope is featured without her chauffeur Parker.

Ricochet - S2-E5

Audio problem: As John and Gordon are fitting the new component on Thunderbird 5, John says, "It looks like we'll be another two hours before we're back in business. In the meantime, International Rescue is non-operational." But he is voiced by David Graham, not Ray Barrett.

More mistakes in Thunderbirds

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