A powerful seaquake turns a busy day for International Rescue into a perilous one. Lady Penelope helps Thunderbirds find who put seismic destabilisers on the sea bed.
The Hood holds the world at random threatening more quakes unless the world gives him International Rescue.
Alan is on space junk duty, when one of the pieces of debris turns out to be a heat-seeking SAT-MINE that activates and locks onto TB3's heat signature. Back on Earth, Lady Penelope and Parker implement a plan to sneak into a top-secret storage facility.
Thunderbird 5 picks up an unusual radiation spike from a remote corner of Africa, and Scott rushes in with Thunderbird 1 to check it out. Using special equipment, Scott enters the mine and discovers the source to be a leak of unstable uranium. Moments later he is attacked by a mysterious woman who claims that the mine belongs to her family. During their confrontation, the mine begins to crumble - and Scott and she must find a way out.
Kayo is riding aboard Fireflash, a supersonic airliner invented by Brains, but she is unaware that its controls have been tampered with. International Rescue notices the plane has vanished from their monitors and attempt to locate it. Kayo realises that the plane is flying in the wrong direction, and manages to avoid a powerful gas attack that has knocked out both passengers and crew.
An anti-technology group calling themselves The Luddites power up an electromagnetic pulse device underneath London, crippling everything that uses electricity. The result is a near catastrophe as the entire city shuts down. Virgil and Grandma Tracy must find and disable the device - with the help of Lady Penelope and Parker.
A strange malfunction occurs on a high-speed train in Japan, leaving it out of control and unable to stop. Brains comes up with a plan to fix the problem before a disastrous crash occurs - the only problem is that he will have to board the speeding engine himself to pull it off. Scott manages to get the genius on board, where they find the problem is more complicated than they thought.
A series of cascading equipment failures leads John to realise that rogue A.I. has gained control of Thunderbird 5. The programme is sending false monitor images to Tracy Island to deceive the other brothers. John finally gets through to Lady Penelope and informs her of the situation. Once the other brothers figure out what is going on, Alan is despatched in Thunderbird 3 to rescue John.
A malfunction at a mining operation sends an asteroid careening towards the sun, endangering crewman Ned Tedford. Alan and Kayo deploy Thunderbird 3 for the rescue mission, but a rogue solar flare knocks out their sensors. They land near the mine, and must find a way to alter the asteroid's trajectory so that it slingshots around the sun instead of crashing into it.
Lady Penelope, Parker and Gordon visit the Amazon desert, where an archaeologist shows them round an ancient temple. When they all become trapped inside, the academic refuses to let them call for help, fearing for his reputation - so the trio of heroes must put their wits to the task of finding an escape route.
International Rescue scrambles all the flight-capable Thunderbirds to rescue the crew of CIR.R.U.S, a high-atmosphere weather station, now in danger due to the arrival of a fierce storm. TB1, TB2 and TB3 are quickly crippled by the conditions, and the only hope of salvaging the mission lies with TB5 - and John's ability to mount his most daring rescue ever.
A heavy metal extraction platform carrying toxic waste at the bottom of the ocean is in trouble. Gordon rushes in with Thunderbird 4 when a fire on board the rolling factory damages its steering capabilities. With the help of Lady Penelope and Parker on the surface, Gordon must rescue platform operator Ned Tedford and prevent the rig from spilling its waste.
International Rescue have to act quickly as a collider is activated, bring heavy objects down to earth including a commercial airplane.
Brains has invented a self-constructing luxury hotel which orbits around Earth. Unfortunately for its guests, the luxurious hotel in space begins to malfunction and the International Rescue team have to step in to avert a major disaster.
Scott and Alan travel to the far side of the moon to rescue their father's best friend from a meteor shower.
Virgil and Brains attempts to rescue a mining crew trapped inside a glacier, but the scientist in charge of the project refuses to leave.
The Hood traps Lady Penelope and Parker inside an underwater hyper-loop train during a high stakes robbery.
High in the Arctic, a machine designed to harness the energy of the aurora borealis has gone haywire. If not repaired, it could permanently disrupt the magnetic field protecting the Earth. Scott and Virgil answer the call, despite Virgil's insistence that they both need a break. Complicating matters is the fact that an atmospheric approach will be impossible, which forces Scott and Virgil to configure SKI PODS to get there in time. Scott admits the burden he feels as leader but the crisis is averted with Max's help.
A seismologist and his son alert the authorities to the presence of a rogue wildcat mining operation, only for the machinery to trigger an earthquake that swallows the equipment - along with the father and son. Gordon must attempt a daring underground rescue of the boy and his injured father, while Virgil has to find a way to shut down the out-of-control rig.
A scientist accidentally locks herself inside a vault which is being used to store unstable matter. There is only one person who has successfully broken into a vault like this - Parker. Colonel Casey of the GDF recruits Parker for the job but the safe cracker ends up locking himself and Lady Penelope inside. Virgil and Scott take the vault to an isolated area on Thunderbird 2. Now Parker and Penelope must try and free themselves before the anti-matter explodes.
It is 2060 and once again Halley's Comet is passing close to Earth. A businessman and his personal assistant fly up to chase the comet but end up sending out a distress call. Alan and Scott have to rescue them in Thunderbird 3.
Parker gives Alan driving lessons at the Creighton-Ward estate in FAB0 while Lady Penelope has tea with her great aunt Sylvia. Progress is slow until a pair of bumbling intruders attempt to kidnap the ladies. FAB1 is the only vehicle that can reach them in time. Parker is injured and cannot drive so Alan has to conquer his fear and rescue them.
During a joint operation between International Rescue and the Global Defence Force, a series of mishaps nearly ends in disaster. In the wake of the botched mission, Colonel Martin Janus takes over the GDF, imposing a strict set of restrictions on International Rescue. As Lady Penelope and Parker attempt to reason with the colonel, they begin to realise that he is not quite what he seems - then it becomes apparent that he really is an imposter working for the Hood.
In the Arizona desert there is a facility known as CATCH, from where all air traffic in North America is controlled. Scott and Virgil handle a rescue mission involving a mid-air plane collision while Kayo infiltrates the bunker with the help of Thunderbird Shadow. Then Kayo realises that this is all part of a much bigger plan by the Hood.
An uncover mission ends up getting ruined as a result of the Global Defence Force as Kayo finds herself getting blackmailed.
A number of carefully staged disasters require the full attention of everyone at International Rescue. Kayo discovers that the Hood is behind these acts of terrorism and has actually infiltrated Tracy Island. To make matters worse, the Hood has rigged up explosive devices to bring down the Thunderbird craft - and now he reveals his shocking secret to the Tracy brothers.