Rupert and the Hedgehog is the 30th episode of Rupert (TV series) and the 4th episode of season 3.

In this episode, 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 favorite shrubs to its proper size, which results in a "hedgehog" the size of a tour bus running loose through the Nutwood countryside.