When the laws of logic start to listen to narrator Isambard Sinclair, Danger Mouse and Penfold find them self transported back in time to the year 1215 A.D. Having a Robin Hood and Little little John persona projected upon them by way of more narration, our heroes set off to rescue Sir K from the clutches of Baron Greenback, sheriff of Nottingham.
Someone has stuffed the most important seats in England with cactus. Danger Mouse surmises the pointy plants come from the giant saguaros. Therefore, he and Penfold head for Mexico where they soon home in on Baron Greenback. Unfortunatelly, the villainous toad has an angry bull on his side.
Wufgang Bah, the world's worst composer, has used a ray to destroy all the music on the planet so people will have to listen to his. Dangermouse and Penfold are on the case, using a cassette deck with the last remaining tape of background music, without which they are powerless.
A spaceship has crash landed in Birmingham city center. DM and Penfold meet an alien who is looking for a small furry creature called a Ticklehipos, that just loves to climb up trouser legs and multiply.
A new experimental enzyme being tested at the Wonder White Sub company laboratory bonds with an aggressive molecule and escapes down the drain. It starts attacking people, pinching underwear and tries to turn everything white.
GB, the Terrible Toad is using a giant reflector stashed somewhere in the alps to melt the ice caps of the Arctic. His plan is to flood the world and sell rubber dinghies and rubber ducks at inflated prices.
The Duke of Bedbug's stately mansion has been stolen and is currently sailing up to sea. Hannibal Hogarty and his team of highly trained elephants are holding it to ransom, so DM and Penfold team up with B.L.E.E.P. (the Building Location and Emergency Expedition Platoon), led by Dangermouse's old pal Mad Major Melvin.
Colonel K has been kidnapped by a mechanical cat called Paws. Danger Mouse and Penfold race to castle Nasty, where their chinchilla in charge is being held. However, they are unaware that the feline fiend has fed the secret details of Danger Mouse's brainwaves into his computerized brain (after stealing them from the Colonel's filing cabinet). Thus Paws is able to anticipate every move the mouse makes before he actually does them.
Dangermouse and Penfold are send to investigate a weird disturbance at Stonehenge on All Hallow's Eve. Once there, DM is ambushed by his own suppressed evil side, who freezes time in order to take control over the heroic 98 per cent of him.
The phantom time traveling grandfather clock has reappeared, this time in Windsor castle. When DM and Penfold investigate the scene, they encounter the disgruntled time traveler Master Snozzle, King Arthur's first and former wizard.
Great Britain is in complete chaos as every cup of tea has turned into low grade dishwater. Baron Greenback is collecting the remaining tea supply by tractor ray beam to his teapot shaped satellite, the TB1.
Penfold receives an intergalactic delivery: a free gift from the Cosmos book of the light year club. It's the 'Cowards Pop-up book of Slobbering Monsters by I.L. Scaremstiff. Once he opens it, J.J. Quark unleashes a remote animation ray from space to bring the monsters to life.
Colonel K has had word that Greenback knows the location of the long lost amulet of Egganofice, a medallion fashioned by an ancient Egyptian sorcerer in 5002 B.C. which possesses unlimited mysterious powers. In truth, Greenback plans to let Danger Mouse do the hard work for him and grab the amulet once DM finds it for him.
Professor Squackencluck is lost on an island in the China sea and feels the need to be rescued. Dangermouse deduces that the island in question must be Combaktu and sets off on a daring mission, accompanied by Penfold of course. On arrival, a tricky Witch doctor manages to split our heroes up. While DM is matching wits with the doctor, Penfold finds himself in the clutches of an Uran Utang.
Penfold swallows a new sort of energy pill invented by Professor Squackencluck and goes all superhero on his foes. However, it hinders Danger Mouse even more than usual in his search for a stray messenger pigeon.
A mechanical revolution has begun as all house hold objects unite to rebel against their makers. Luckily DM's car is equipped with an anti-mutiny module, so he and Penfold can go after Baron Greenback. However, the terrible toad is busy hiding from his Frog Head Flyer. The real instigator behind this uprising turns out to be an enormous sentient computer calling itself Mega-Brain.
Dangermouse and Penfold are ordered to find the cause of a dreadful noise terrorizing the world. It seems to be coming from the North Pole, where they find a giant hole housing a secret workshop that keeps the Earth rotating. One of the workers there, Stanley Atkington explains how his colleague Obidiah's attempting to take over now that they're boss 'The Gaffer's away on holiday.