Rupert's encounter with a friendly Stegosaurus in Nutwood Forest leads him on an adventure to the Jurassic Era. Once there, he helps his friend, The Wise Old Goat, repair his malfuntioning Time Machine and avoid becoming a Tyrannosaurus' next meal.
Rupert and Bill's experiment with the art of topiary leads them to use a bit too much of the Professor's new growth formula to restore one of Dad's favourite shrubs to it's proper size, which results in a 'Hedgehog' the size of a tour bus running loose through the Nutwood Countryside.
Rupert and his new friend Ottoline Otter are swept up on a race to find the long lost King's Gold before it falls into the hands of a 'ghost' and his cohort who are actually a pair of nasty treasure hunters.
Rupert and Ottoline find a merry-go-round that has been abandoned on the common and restore it to it's former grandeur. After The Sage of Um accidentally brings the wooden characters to life, the kids find they must rescue the enchanted carousel from the evil Thogmort who wants it for his own financial gain.
Rupert and Gregory Guinea Pig encounter 'The April Fool', an odd little guy living in an even odder little house. He's a load of fun at first, but when the boys grow sick of his relentless jokes and tricks, The Fool isn't inclined to let them leave...