The young spies are called upon to investigate when they hear that the normally peace-loving Prime Minister is on the verge of declaring World War III. Going undercover, Daisy finds that the PM has be…

The Grand Master, leader of the Secret Kriminal Underground League (S.K.U.L.) threatens to freeze the world unless everyone submits to his rule.

When zombies start ransacking music stores, MI9 suspects that a boy band named Crush is responsible, so Daisy again goes undercover to investigate.

Everyone is in the dark as freak power outages sweep Britain.

When a hacker called The Worm takes control of Britain's space defence system and leaves the country vulnerable to attack, Stewart must employ his computer skills to the max.

When a teen working for the CIA joins the team, Blane's jealousy causes him to take a crazy risk.

A wannabe SKUL member, after overhearing an MI9 meeting, thinks that St. Hope's teachers are the agents and sends in bugged animals to spy on them. Okay, nothing much to worry about... until a truth s…

A former beautician's youth potion ends up turning the school's teens into toddlers.

When a teen scientist invents a method of disarming missiles that could make the army obsolete, he is kidnapped by a war-mongering general.

The teen spies defy their superiors to help an extraterrestrial fugitive.

At an award ceremony for M.I. 9, the world's greatest illusionist makes the President of the United States disappear - permanently.

A bumbling inventor's Artificial Intelligence unit tries too hard to enforce the school rules.

When a fashion designer's green logo mysteriously begins appearing on kids' skin, Daisy and Rose go undercover to investigate the House of Ferrago as fashion models.

Britain's young people are laid low by a strange sleeping sickness.

The team investigates when their schoolmate Lenny becomes the latest one arrested in a new wave of inexplicable crimes by previously honest kids.

The high school spies become concerned when a Member of Parliament proposes sending misbehaving British children to a remote island.

A new Cold War is in the making, but this time it's the Grandmaster's plan to give everyone the flu.

It's Daisy's worst nightmare when a plague of head lice hits the school, and turns the kids into master criminals.

The high school spies are amazed to discover that they have competition -- there is another team of young people working for MI9.

The world's most famous diamonds are being stolen, and the team suspects the captain of the all-England football team.

A new invisible spy plane is stolen by a mysterious unknown pilot.

Plants rise up and attack anti-green targets, so Blane goes into action.

The government is powerless to stop an asteroid that is hurtling through space toward the Earth. Looks like it's up to our heroes from MI-9 to save the world.

A different boss, Frank London, takes over the helm of the MI-9 team. At first, Rose is mistrustful of the two new spies, Oscar Cole and Carrie Stewart. The new team's first case is the defacing of th…

A mysterious thief is tunneling into banks all over England. How can the spies figure out where he will strike next, when the prime suspect is in an MI-9 prison?

When Oscar's identity as a spy is revealed on the Internet, Rose and Carrie suspect that he is hiding something. But it may not matter, as the Grand Master has sent the infamous Agent X after him.

When students at St. Hope's start turning into Japanese fighting fish, the team suspect that someone is remotely using a mind transfer machine invented by Dr. Wallis, whom they happen to be guarding.

An old enemy of Frank's breaks out of jail and with his gang comes to steal Frank's invention, the Dark Star, a device capable of instantly bringing total darkness to a large area.

The children at St.Hopes are getting fatter and fatter. They are adicted to Wursts. the team must stop the addiction and find out who is behind it all. Jed Black from M.I.9 exercies the kids so they g…

MI9 get a chance to catch the Grand Master, but the team's new gadgets are intercepted. But a dangerous gadget gets in to the hands of Scoop Doggy making him turn in to the New Grand Master.

Rose has been selected for the National Academy of Brilliance! This is an opportunity like no other and naturally she's devastated. It means she has to leave MI High for good! Frank issues Oscar and C…

Katrina Houseman has arrived at MI High. She has been working on a top secret project: N80, a real life Neanderthal! She needs the spies' help. N80 has been broken out of his cage. Katrina thinks that…

The country's power is disappearing at a rapid rate. The best brains in the UK convene to decide a plan of action. Britain's only hope is Raymond Stilt, inventor extraordinaire, and his genius inventi…

Carrie is set her most difficult mission yet. She has to exploit her friendship with fellow gymnast Lena Larsson to find out about the cruel regime in Boldovia. Lena is from Boldovia and is coming to …

The spies put Flopsy up for ransom in exchange for Oscar's Mum. Surely, the Grand Master won't be able to resist and Oscar will finally be reunited with his mum?

A SKUL space probe has landed on the moon. MI9 suspects SKUL are using it to spy on the world. The spies must find out exactly what SKUL are up to and put a stop to it. Oscar goes to talk to astronome…

The spies have a vital mission - they must protect a ship carrying the last component required to make a nuclear bomb. Other ships carrying nuclear parts have been raided by pirates and MI9 have intel…

The old M.I. High team have graduated and spy handler, Frank London, is on the lookout for a new bunch of intrepid young secret agents to face a global network of evil enemies. Three teenagers who use…

Tempers flare and loyalties are tested when a series of embarrassing incidents threaten to bring down M.I.9. The team suspect a resurgent enemy organisation called KORPS of coordinating a sting agains…

A mysterious fireball crashes in the woods near St. Heart's. Believing it to be a U.F.O., curious students swarm the crash site which turns out to be an enemy satellite with military base information …

Shunned by the pop world for not having superstar looks, embittered music mogul Cuthbert Peabody hijacks a new M.I.9 invention capable of changing a person's face. He turns popstar Calvin Lame's lates…

The team are given their first international assignment in the rogue state of Boldovia where the local secret service has developed a data mining device capable of destroying M.I.9. On a high octane m…

On a campaign to get kids eating more healthily and concentrate at school, St. Heart's is chosen by celebrity chef Jimmy Jubbly as a test bed for his new health drink - Jubblyade. But Aneisha is quick…

Out of sync with the times, an old-school spy infiltrates the St. Heart's spybase and hijacks an M.I.9 invention capable of upgrading M.I.9's technology. Once she reverses it, she offers Dan the chanc…

Funded by KORPS, scientific genius Bobby Bleach has brought the country to its knees by releasing a plague of airborne supergerms which have incapacitated everyone who breathes them in. Tom is the onl…

Top secret scientific components are being stolen by a thief dressed as a character from a best-selling series of fantasy novels. The team go undercover at a fantasy convention only to discover the th…

After being haunted by memories of a terrible decision which cost the lives of his entire team in the final battle with KORPS over ten years ago, Frank is sent to a nightmare treatment centre to preve…

Sent to Uttland on the pretense of being on a school trip, the team must break into the country's deepest, darkest prison to help a former KORPS leader escape. But things go awry when their classmates…

Briefed to protect Grand Duke Nicholas, the heir to the throne of a small European state who has had kidnap threats made against him, the team hide him at St. Heart's, where the arrogant prince must l…

Pieces of the jigsaw puzzle begin to fall into place when the team finally discover the grand scheme KORPS has spent the last ten years building towards. Zoe is kidnapped by KORPS and is revealed to b…

It is a new term at St. Heart's and with Zoe still away, spy handler Frank tasks the team with the mission of tracking down one of Zoe's remaining duplicates, Keri, who is the new intended host of The…

Keri's first mission as a fully-fledged M.I.9 agent comes sooner than anyone expected when the team discover an abandoned KORPS base beneath the school playground. Keen to investigate, their efforts a…

The team are sent to investigate Derren Beige, a flamboyant clairvoyant whose previously pathetic predictions have suddenly become scarily accurate. But Derren is kidnapped from right under the agents…

When government food advisor George Monoblot is sacked after highlighting the dangers of a revolutionary sugar substitute, Cupodium, he seeks retribution and unleashes a virulent form of the substance…

During a successful M.I.9 mission to secure the deadly assassin Samantha Stiletto, KORPS mistakes Keri for the assassin. Keri takes Stiletto's place in the world's most deadly tournament, The Shadow G…

After learning that KORPS have a weapon of mass destruction, the team travels back to the 1940s to learn about the origins of the 'WMD' and the true history of M.I.High.

Tom discovers the online Dark Wizard avatar from Blade Quest has become self-aware.

Dan joins a free running group that has been accused of committing crimes. Stella goes undercover on a teaching job for Saint Hearts.

Frank is asked to join a secret order within M.I.9 called the League of Mata Hari. However, the curious team uncovers a criminal conspiracy that runs throughout M.I.9.

M.I.9 have acquired a fragmented message from the terror organisation 99p. They are a group that is dedicated to bringing down the world's economy to 99p. The message reveals that the group is going t…

Mandy Pluckley, the country's top 'agony aunt', has been abducted by KORPS. She is the sworn confidant of the Prime Minister and he is dependent on her. Without her guidance, he has started to lose hi…

The MI High team have set up their own agency after being fired from M.I.9. After many unsatisfying missions and almost quitting the job completely, they get the call they've been waiting for. Edward …

The team, Frank, and Stella have gone into hiding as M.I.9 has been taken over by KORPS. As KORPS' plans are nearing completion, the team must act fast. Frank tells them about 'The Heart', a rumoured …