The Hood uses his power over Kyrano to force him to disable Thunderbird 1's Automatic Camera Detector, then poses as a cameraman on a movie set to trap two actors in a flooding cave. When International Rescue comes to help, he films their machines and Scott must chase after him to destroy the film of the operation.
- Main article: Martian Invasion/Storyline
Regular Voice CastEdit
- Jeff Tracy - Peter Dyneley
- Scott Tracy - Shane Rimmer
- Virgil Tracy - David Holliday
- Alan Tracy - Matt Zimmerman
- Tin-Tin Kyrano - Christine Finn
- Gordon Tracy - David Graham
- John Tracy - Ray Barrett
- Kyrano - David Graham
- The Hood - Ray Barrett
Guest Voice CastEdit
- Goldheimer - Ray Barrett
- Bletcher - David Graham
- General Strond - Matt Zimmerman
- Maguire - David Graham
- Slim - Matt Zimmerman
- Martian Pete - Peter Dyneley
- Martian Ray - Ray Barrett
- Director of Photography - Shane Rimmer
- Production Manager - David Graham
- Make-Up Girl - Sylvia Anderson
- Brian - David Graham
International Rescue Equipment UsedEdit
Non-International Rescue Equipment UsedEdit
- Main article: Martian Invasion/Transcript
- For the 2-part 'cliffhanger' format, the first installment concludes at the commercial break where Thunderbird 2 lands on the movie set opposite Thunderbird 1.
- Although The Hood's employer is clearly called "General X" on-screen, his name is Strond in the script.
- The Hood identifies himself as "Agent 79" in his radio transmissions to General X.
- The cost for the film of International Rescue is $200 million.
- Brian, the special effects technician, is named after (and modelled on) Brian Johncock, chief of the 2nd special effects team.
- Martians Pete and Ray were named after their respective voice actors, Peter Dyneley and Ray Barrett.
- Maguire states that Martian Ray is going back to the space ship, but we only see Ray standing where he is whilst Martian Pete moves further towards the cave.
- When the Production Manager relays to Goldheimer the situation about the rest of the crew not being able to free the actors from inside the cave, the Director of Photography's puppet is used by mistake.
- When Thunderbird 1 lands, there is no lettering atop the craft. When Scott calls for help with his equipment, the lettering atop the craft saying "Thunderbird 1" suddenly appears.
- After Goldheimer says "Right—action!" and the cave entrance explodes and caves in, in one of the next interior cave shots when rocks fall and water comes through and starts to flood the cave, someone's finger can be seen pushing the rocks into the cave.
- Scott tells Goldheimer "You've got three other cameras." but there is only one camera left to check.
- Thunderbird 1's cockpit window changes appearance between shots.
In 1992, several episodes of Thunderbirds were adapted into comic book format for Fleetway's Thunderbirds The Comic series. Martian Invasion was among the latter stories to undergo this treatment. Written by Alan Fennell and illustrated by Keith Page, the 12 page adaptation began in issue #24 and was spread over 3 issues, emulating the presentation of the 1960's TV Century 21 stories.
For a contemporary (or at least in the 1990's) audience, Thunderbirds underwent a repackage, redub, and rebroadcast as part of FOX Kids' Saturday morning line-up. Due to a severe decline in ratings, only half of the episodes made it to broadcast before the series was pulled by the network. As a result, the modified version of Martian Invasion never aired, and remains among a handful of missing Thunderbirds episodes to this day.
- Main article: Martian Invasion (TCTB)
- French: L'invasion des Martiens
- German: Gefährlicher Dreh
- Spanish: Invasión Marciana
- Italian: Marziani sulla Terra
- Dutch: Invasie van Mars
- Japanese: 火星人の来襲