Professor Professor sends Victor and Anita to infiltrate the Impostors' base - where they find that he was kidnapped by The Impostors a month ago, and never escaped.
Victor and Anita must deliver a rare slipper orchid to the Ammonites of Ammo-niah, as proof of mankind's ability to look after Earth and continue their tenancy.
Someone is attaching weird little motor thingies to famous buildings and using them to hold illegal monument races. It's a terrible threat to security - what would happen if Doctor Doctor got hold of the technology?
The Imposters are trying to take over the world with ice bombs, and it's up to U.Z.Z and the unknowing assistance of the aliens within the Secret Spider to stop them.
A bit-part actor known only as Birdman threatens to release all of U.Z.Z.'s secrets to the press. In the meantime, Professor Professor and Changed Daily have accidentally gotten demoted following a training exercise.
Changed Daily is finally persuaded to talk about his nick-knacks. On the back of a picture of his old partner, Lucy Woo, they find a note asking him to rescue her - twenty years ago.
The Wobble Men have finally broken through. The only one who can save the world is Victor's father Lionel, who's been trapped behind wobbly lines for twenty years.
What chance do UZZ have at saving the world from the Gobblotron when World Savers Inc. are so mysteriously good at it - and when Professor Professor has accepted a job with them?
UZZ decide to cancel their line of Simon Sayz action figures and go with a game instead. Simon swears revenge. And when he accidentally gets covered with nano-goo, it looks like he'll get his wish, unless Anita can get to level 13 first.
Santa Claus's amazing gift for unforced entry into any building helps Victor and Anita enter an impenetrable Floaty Head base and rescue Changed Daily from an alien zoo.
Professor Professor and Doctor Doctor must work together to prevent UZZ and THEM being fired into a purple hole by Neville Thunderbottom, a jealous fellow classmate from the School for the Chronically Gifted.
The Secret Man has disappeared. To find him, Anita and Victor must locate The One Breath Woman, and - providing they can understand her - unravel an Impostor plot to take over the world.
Has Victor really stolen all the spoons in the world? Why are all the parrots shouting "help"? And why does everyone's hair look so messy? To see the answers, Victor must have his blind spots removed.
After saving the world from The Chef, Doctor Doctor, Reptogators, and Impostors, Victor and Anita have Save Fatigue and the world is taken over by a clown who demands that buildings wear silly hats and everyone says "bim".
Why is The Secret Thing being stolen so frequently? Where has Doctor Doctor taken Changed Daily and his fireplace? Surely none of this can be anything to do with UZZ agent Kent B. Trusted..?
