International Rescue attempt their most difficult mission ever while defending Tracy Island from a dangerous assault.

Gordon travels in Thunderbird 4 to recover Braman but discovers that the Chaos Crew have gotten to the robot first. An underwater battle ensues and both Thunderbird 4 and Gordon are harmed.

Brains and Alan visit the Quantum Research Center, adjacent to New Geneva in Switzerland, to see the Supreme Hadron Collider switched on. Disaster strikes when the collider is switched on, creating a gravity well. A satellite is sucked down into downtown New Geneva, and International Rescue is mobilised when an aircraft and the World Wide Space Station are drawn into the gravity well, threatening the city. The only craft that can withstand the gravitational pressure is Thunderbird 4, used out of its normal undersea environment.

A giant heavy metal extraction plant, moving along the Pacific seabed and collecting toxic waste, has a sudden compartment fire, leaving it out of control and heading for a undersea chasm. Thunderbird 2 is dispatched with Thunderbird 4 to effect the rescue of the only crewman, Ned Tedford once again, and make safe the toxic waste it is carrying. Lady Penelope, meanwhile, investigates the company that owns the extraction plant, when both John and Gordon suspect the owner was more concerned for the cargo, than the crew, and soon has trouble from the Hood.

International Rescue attempt their most difficult mission ever while defending Tracy Island from a dangerous assault.

When disaster strikes International Rescue answers the call! The Mechanic, having completed Project Sentinel, sets his sights on destroying The Hood. While International Rescue scramble to save their former foe, Brains goes on a dangerous mission to stop the Mechanic once and for all.

A mysterious tunnelling vehicle leaves a worker trapped in its wake and it is up to Gordon and Virgil to free him. Meanwhile, Parker and Penelope track down the digger and discover an old foe at the controls.

Virgil and Grandma are out resupplying Thunderbird 2 when a distress call comes in. A mine is in danger of collapsing in the desert. When Virgil goes to help the workers, he gets caught in a massive sandstorm and it is up to Grandma to save the day.

A young GDF guard gets trapped inside a radioactive, and possibly haunted, nuclear facility. Scott goes in to assist, with help from GDF Lieutenant Marion Van Arkle.

Through the use of archive footage, Brains informs the team of a discovery, but in order to gather more information, our heroes split into groups and search for an escape pod missing since Jeff Tracy's crash.

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.

Virgil attempts to rescue a mining crew trapped inside a glacier, but the scientist in charge of the project refuses to leave.

The Tracys attend the Global Air Show, and a test pilot unveils the ultra-fast `Icarus' superjet.

An emergency space docking goes wrong and the core of the orbiting Spacehub transit terminal goes into meltdown. A young traffic controller named Conrad is trapped inside and Alan is unable to reach him. With Thunderbird 3 being used to keep Conrad alive International Rescue's only hope is to modify Thunderbird 2 for space flight in order to transport a new cooling system to the hub.

When a popular vlogger gets trapped during an avalanche, International Rescue must find a way to carefully dig him out.

When the first run of an inventor's newly-constructed hyperloop begins to malfunction, Scott must try to find a way to slow down the fast-moving ride.

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.

Gordon ventures deep into the Marianas trench to rescue a survey team, and ends up discovering an early International Rescue prototype vehicle once flown by Jeff Tracy. Gordon takes Thunderbird 4 down to save the crew and get a better look at the prototype. But the survey ship, designed by The Mechanic, transforms and wrecks Thunderbird 4. Gordon is forced to abandon ship and seek refuge on his dad’s TV-21 plane. To save the survey crew, Gordon powers up the plane and manages to take it up to the surface.

When seismic activity near the coast of Greece reveals the lost city of Atlantis, two scientists venture below the depths to explore the area. But when their submarine becomes stuck, International Rescue are called out to assist.

The Tracys receive a distress call from the crew of a cargo zeppelin. A giant loading claw malfunctioned and has started attacking anything that moves. Thunderbird 1, 2, and Shadow launch out in an attempt to land the ship safely. But the zeppelin contains a dangerous fuel source and there are still crew members trapped near the loading claw. Scott makes it to the cockpit of the zeppelin while Virgil begins to offload the fuel source. Kayo puts on a mech suit to deal with the loading claw while the crew escape. Ultimately, they put the zeppelin down outside city limits and escape just before it explodes.

Kayo, with the help of a futuristic game creator that only talks like a wizard, must play through a futuristic holo-game called Cavern Quest to stop The Chaos Crew from stealing a powerful piece of technology.

The team travels to Langstrom Fischler's newest invention to stop a hive of malfunctioning weather drones.

Lady Penelope, Parker and Sherbert answer a distress call from Parker's old acquaintances - Light Fingered Fred and Gomez. The distress turns out to be a ruse.

Lady Penelope and Parker are testing out FAB2, a luxury yacht, when they receive a distress call from a nearby tanker. A tsunami has formed, and the massive wave is headed for the stalled tanker's location.

Lady Penelope, Parker and Kayo arrive on the scene of a massive semi-submersible ocean oil rig to decommission the polluting relic, but supervisor Malloy has other plans.

When two scientists notice a huge section of coral reef bleaching from acidic waters, Gordon launches in Thunderbird 4 to discover the cause. Under the water, he finds a sunken cargo ship containing dangerous acidic materials.

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...

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.

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 hepetologist is bitten by a rare spider in a dense rainforest, and a carrier drone containing anti-venom goes off course. Kayo, Scott and Virgil fly to the scene to find the drone before its too late.

A distress call from an interstellar ship called EDEN leads Alan and John to explore the wreckage. There they find space pirates and mysterious spider-like robots known as Builder Bots.

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.

Virgil and Gordon are dispatched when a transporter carrying volatile cargo is hijacked by Fuse.

An urban explorer named Scraps gets trapped inside an underground trash mine. Scott, Gordon and Virgil investigate with the help of Thunderbird 2 and the Mole POD.

Two Rescue Scouts get locked inside an antiquated crablogger vehicle in the middle of a forest fire. The Tracys respond, and assist both on land and in the sky to rescue the scouts and put out the fires.

A facility known as CATCH, from where all air traffic in North America is controlled is sabotaged and Scott and Virgil handle a rescue mission involving a mid-air plane collision while Kayo infiltrates the facility using Thunderbird Shadow. Kayo discovers that this is a diversion and part of a much bigger plan by the Hood. Disregarding Scott and John's instructions regarding International Rescue's mission to save people and not act as policemen she puts herself in danger and is saved by an unlikely source.

Halley's Comet is passing close to Earth. Businessman Francois Lemaire, on an ego trip sending live pictures back to earth, with his unimpressed wife Melanie on board his space yacht the Solar Wind. They fly into the comet's tail and the ship is damaged losing communications. John in Thunderbird 5 monitoring the situation despatches Thunderbird 3 with Alan and Scott to look for survivors. Alan is particularly excited to be going to Halley's comet.

The Estrella Grand is a self-constructing luxury hotel, designed by Brains, which orbits around Earth. The hotel suffers a mysterious hull breach that will not repair itself causing it to begin to fall to earth. Thunderbirds 2 and 3 are launched to rescue the guests including Lady Penelope and Parker. Kayo flies with Thunderbird 3 to board the hotel in search of a saboteur. Note: This episode is a homage to the original Thunderbirds episode, Ricochet (satellite crashing to Earth).

A family becomes trapped in a city that is being overtaken by rising ocean tides.

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.

When two space freighters crash in low-earth orbit, Alan and John must evacuate the hotheaded pilots from a dangerous debris field.

Lady Penelope's Great Aunt Sylvia visits Creighton-Ward Manor for afternoon tea, but has something important to discuss... Guest Star: Sylvia Anderson as Great Aunt Sylvia.

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.

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.

When gas from a dangerous hydromethane reserve begins to leak, Virgil and Gordon team up with a retired well-capping specialist to plug the leak. Gordon soon discovers the Chaos Crew syphoning off fuel - and moves to stop them.

Disasters around the globe leave only Brains free to investigate when Dr. Quentin Questa makes his annual claim that an Icelandic volcano is about to erupt.