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After intercepting a missile on course for earth, Steve Zodiac and the crew of the XL5 travel to Planet 46 and discover the Subterrains who launch another missile at the earth with Venus trapped inside.

The Fireball XL5 narrowly misses a planet that bas broken out of it's orbit and realize the planet is on a collision course for the planet Membrono. After concluding the planets are uninhabited, Steve realizes he saw a flying saucer and after the ship lands at Venus' house, the XL5 is lured back to save the planet Membrono from destruction.

Venus and Prof. Matic are about to set off in the Mayflower 3 to colonise the nearby planet, New Earth. But the Advance Scout has been kidnapped by two evil midgets who plan to hold the new immigrants captive.

After a blackout at Space City, a missile gets through the radar blackout, and is heading towards Space City with a dangerous cargo...

The crew of XL5 encounter Boris and Griselda the space pirates on the Companion 12 space station.

When experimenting with a new warhead in space, Steve Zodiac is forced to save Venus from the clutches from the sinister Cult of Miras before she can be sacrificed to their sun-god...

Everyone on planet Zolpheid is killed in an Aquaphibian attack, except for Rald and Jerek. Receiving an SOS, Space City sends Fireball XL5 to rescue the two from Zolpheid's oceans.

While babysitting Commander Zero's son, Jonathan, Venus tells him story about when Fireball XL5 encountered a group of space pirates.

As Steve celebrates the anniversary of his family's circus act, Venus falls asleep and dreams of a plot devised by Mr and Mrs Space Spy and the nomadic Monadians to take over the Earth…

To capture a group on criminals, Steve, Matt and Venus pretend to steal XL5.

Fireball XL2 has crashed on Planet Monotane, and Fireball XL5 is sent to investigate, only to run into a sort of space dinosaur...

Major Jim Ireland returns to Earth after 10 years in space, but unknown to everyone, he has become an agent for Kudos, the only survivor from the planet Zanadu, who wants revenge on all Lazoones for destroying his people.

The Fireball XL5 foils an attempted bombing while transporting the King of Platonia and is caught in the middle of the plot to assassinate the King and sent two planets into war.

After detecting a series of massive explosions in space, Steve and the crew of XL5 find a planet three times bigger than Earth, but they soon crash land...

On Planet 46, the Subterraineans plan revenge on Zodiac and send a robot bird to infect him with radium.

After top secret plans are stolen from Earth, XL5 enocunters Boris and Griselda, but Matt is captured.

Kernak, ruler of Kemple plots the resettlement of his people to Planet Olympus by poisoning Olympus' ruler's son. Venus and Matt are captured and must be rescued by Steve.

Lt. 90 qualifies for his astronauts wings by landing XL5 in one piece and then piloting XL1 off the launch rail, but on his return to Earth in a capsule, he finds it has caught fire!

Fireball XL5 recieves a distress call on a distant planet, and Steve Zodiac journeys to investigate.

At Space Observatory 1, Matt and Dr. Stamp work on a new Ultrascope space probe. However, the people of the planet the probe is sent to observe don't take too kindly to being watched and kidnap the scientists.

While stargazing, Prof. Matic discovers a new planet, but it doesn't read on any electronic instruments. Curious, Steve and the others set out in the XL5 to investigate, and find that the planet is more sinister than first thought...

On a survey of Pharos, the crew of XL5 disocver the planet is unstable and must be destroyed. After setting up bombs, someone traps Steve and the others in with it.

Whilst on patrol, the XL5 comes across the wreck of an old spaceship. Setting out to investigate, they find it to be the TA2, that disappeared in the 2020's, and the hunt is on to find her pilot...

With Steve and Venus on vacation, Commander Zero is left to look after Zoonie the Lazoon, who causes havoc in Space City with Commander Zeros' son, Jonathan.

Matt completes his new time machine and sends Robert back to 1875, but Steve, Venus and Zero are accidently sent back as well.

On Planet 73, two scientists working at a mineral research lab discover that they in the path of six tanks controlled by Granatoid robots. They can only be stopped using a rare material, but all the supplies have run out!

Robot freighters are being sabotaged by a shoddy space salvage company, and Steve Zodiac is determined to find the proof he needs to bring the sleazy brothers to justice.

On planet Floran, the crew of XL5 try to discover what is killing the plants there, however the native people believe they are an invasion force and drug their food.

A mechanics professor is giving a lecture on robotics at Space City. But barely a few days after his visit, Robert suddenly rebels and steals Fireball XL1! Steve and Venus follow him in the XL5, but find themselves prisoner of a robotic society, with Robert as their jailer.

While drawing a schematic for a new radar screen, Lt. Ninety is surprised to find himself promoted to the rank of General!

There is a strange fog descending on Space City, blocking out communications with the rest of the outside world. But what does this strange cloud hide?

While on route to Space Station 9, Steve loses control of XL5. Racing out of control, XL5 passes the light barrier resulting in the loss of all but an hours worth of oxygen.

XL27 makes an emergency landing at Space City and the crew are all found to be unconcious. XL27's route is traced back to planet Zavia where the inhabitants plan to freeze the Earth by deflecting the sun's rays.

Blazing fireballs from a space cloud cause widespread damage on Earth. XL5 is sent to investigate but it catches fire and has to retreat. Steve proposes using an old satellite to detonate the cloud, but a fireball is heading directly to Space City.

General Rossiter comes to Space City to present Steve with the Astronaut of the Year award. XL5 and the ground staff put on a song and dance show to raise money for charity. Meanwhile Venus is put in danger aboard a new supersonic jet liner.

XL5 transports Geologist Frazer to Electron for a survey. When Frazer discovers a strange rock in a deserted town, he goes mad and threatens to destroy Fireball Junior, if Steve doesn't take the rocks back to Earth.

The crew of the XL5 becomes entranced by a strange alien sphere and Robert is the only one who can save the crew.

On patrol, Fireball XL5 suddenly catches fire. The cause, sabotage! Commander Zero sends Light Patrol LP22 to investigate, but the XL5 crew have disappeared...

The XL5 becomes caught in the gravitational pull of planet Megneton and discovers the plot by the Solars to bring the Earth's moon into their orbit.