Mr and Mrs Bold are just like you and me: they live in a nice house, they have jobs and they love to have a giggle. One slight difference: they're hyenas. That’s right - covered in fur, tails tucked into their trousers, and they really like to laugh. So far the Bolds have managed to keep things under wraps. But the nosy man next door smells a rat. Could this be the end of Teddington's best-kept secret?

The Bolds are a family of hyenas living as humans in a suburban house. But now their kindness to animal waifs and strays has become legendary, and more and more animals keep turning up to stay! But when the Bolds take in a couple of racehorses who are on the run, they worry their animal magnetism is getting to be too much. Have these hyenas bitten off more than they can chew?

It's the summer holidays, and the hairiest family in Teddington decide to take a well-earned holiday by the seaside. With their extended hyena family in tow, they head on down to Cornwall for a spot of camping. But it's never long before trouble sniffs these hyenas out, and Bobby is mistaken for a pup and snatched by a wicked dognapper. The Bolds will need all their ingenuity to hunt her down and rescue all the pilfered pooches. But can these hyenas-in-disguise save the day, without letting the cat out of the bag?

This time, Teddington's wildest family have decided to stay at home and keep their heads down - it isn't always easy hiding tails and fur under clothes, and it's important not to raise suspicion amongst their human neighbours. But trouble soon comes skulking when a very sly fox starts making a big nuisance of himself. It's up to the Bolds to try to stop him - but the solution has them foxed.... 

The Bolds are very surprised to be visited by Fred's mother, Granny Imamu. She's travelled all the way from Africa, and now she's here, she does not approve of what she finds. Hyenas, living as people - whatever next! Granny Imamu starts to stir up mischief with twins Bobby and Betty, encouraging them to get in touch with their beastly side at school. And then the twins' teacher comes to the Bolds with a rather unusual problem: her grown-up son Jeffrey just isn't like other people.