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.