Angela bakes a cake to enter in the Home Appliance Show Bake-Off, but Old Tom eats it by mistake. Feeling guilty, Old Tom decides to bake a new cake to replace it. With Lucy's help, he runs around the expo gathering the ingredients from the food pavilions, and then mixes them all together in one of the expo's spinning rides. Old Tom and Lucy use an appliance exhibit to cook the cake and then race, with Angela, to the Bake-Off - where the cake wins first prize!

Angela gets a temporary job at a local sports store, and takes Old Tom along. The store owner, Nugget Gristle, doesn't like Old Tom at first, but when Old Tom starts playing on the sporting equipment, he attracts so many customers that Nugget promotes him to head salesman. Nugget then orders a state-of -the-art exercise machine - the Robo-Trainer - but tells Old Tom not to play on it. The minute Nugget's back is turned, however, Old Tom switches the machine on - and it goes berserk. Nugget tries to turn it off, but gets trapped. It's only when Angela and Old Tom work as a team that they can save the day.

It's April Fools Day and Old Tom and Lucy play a trick on Billy, who tries to get his own back. Instead, he meets Angela and tricks her into believing that a flying saucer is about to land in the park. Alarmed, Angela races through the town warning everybody. Meanwhile, Billy finds Old Tom and Lucy at a pizza parlour and manages to get them thrown out. As they leave, the big, pizza-shaped signs falls off the building and collects Old Tom as it starts to roll down hill. Meanwhile, at the park, Billy is about to tell Angela that he tricked her about the flying saucer, when the runaway pizza sign bounces off a rock and flies overhead. Everyone thinks it's a flying saucer, and Billy's trick backfires on him.

When an outing is cancelled because of rain, Old Tom decides to invent a device that can change the weather. Adapting a TV remote control, he almost succeeds. At first, he creates an indoor snow storm. Then, he makes an electrical storm. When Lavinia gets hit by a lightning bolt, Angela asks Old Tom to stop his experiments. However, she tries to turn on the TV with the remote and accidentally starts a mini-tornado, which lifts the house off the ground into the storm clouds. Old Tom has a brain wave and switches on all the vacuum cleaners, which suck up the clouds to create a sunny day. Success at last!

Billy has a fabulous new tree house - complete with elevator - and all the kids want to play in it. However, when Billy refuses to let Old Tom in, Lucy decides to build her own with rubbish from the tip. Meanwhile, the other kids aren't having much fun because Billy is being too fussy about his new tree house. But when they try to leave, they get stuck in the lift. Old Tom and Lucy, on their way home from the tip, see the drama. Old Tom rescues the kids but accidentally destroys the tree house. So they all go back to Lucy's place and build a new one.

Old Tom and Lucy are practising for a go-kart race but Billy destroys their kart. Dismayed, they go home to Angela's place where they see a big box in the living room. Not realising it's an Egyptian artefact belonging to Lavinia, they remove its contents - an old statue wrapped in cloth - and take the box outside to turn it into a go-kart. Meanwhile, Angela comes home and, seeing the wrapped statue, thinks it's Old Tom in bandages and she rushes it to the hospital. Then Lavinia arrives, looking for her statue. Lucy realises what has happened and wraps Old Tom in bandages, to make Lavinia think it's the statue. But Old Tom moves and Lavinia thinks the statue has come alive. She runs off, and Old Tom follows, out of control, in the new go-kart. They race through town and end up in the park, where Old Tom wins the go-kart race.

A TV producer sees Old Tom causing mayhem at a shopping centre and, thinking Old Tom is a comic genius, gives him his own TV show. Soon Old Tom is a TV star, and everybody who previously disliked him know wants to be his friend - even Lavinia. When Old Tom is mobbed by fans at the Department Store, Lavinia rescues him and takes him to a party she is throwing in his honour. Old Tom enjoys this adulation until he realises that his old friends - Angela and Lucy - are being left out. Old Tom turns his back on his new fame and new friends, and goes back to being himself.

In the final episode, Old Tom seems to be back at square one - rejected by much of the community. On a trip to the observatory, Billy causes trouble but Old Tom gets the blame, so he runs off and hides in his old rocket ship. When Billy accidentally unleashes an asteroid which threatens to destroy the world, Old Tom takes off in the rocket - with Lucy and Angela - and manages to avert the catastrophe at the last minute. Old Tom lands the rocket back on Earth, in the middle of Lavinia's party, where he is finally appreciated for who he is - wild, free-spirited and occasionally berserk - but always a hero.

Angela Throgmorton is leading a somewhat lonely life when a strange, scruffy, creature appears on her doorstep. Feeling sorry for the poor thing, she takes it in, feeds it and cleans it up. However, when the creature manages to flood the house, Angela decides to find another home for it. This soon teaches Angela two lessons: firstly, that no-one wants the creature; and, secondly, that she really quite likes him. However, Old Tom and Angela get separated, and Angela goes home alone. Then a storm hits. Angela, learning that the creature has taken shelter in a storm drain, goes off to rescue him. Surfing through the drain on her ironing board, Angela snatches her new friend just before the storm-waters can wash him away. Angela takes him home and calls him Old Tom.

Told by her friend, Lavinia, that she and Old Tom should 'smarten themselves up', Angela takes Old Tom to the local department store to buy new outfits. There, they bump into Lavinia, who insists on taking them shopping. Lavinia leaves Old Tom to play on a children's ride, as she takes Angela around the store, buying increasingly silly outfits for her. Meanwhile, Old Tom breaks free from the ride and causes mayhem around the store, much to the anger of the store manager, Mr Pangborn. Angela, in her new outfit, gets away from Lavinia, just as Old Tom, in disguise, manages to escape Mr Pangborn. They both end up in the Missing Persons department, where they recognise each other and, shedding their silly outfits, decide they don't need to smarten up, after all.

Lavinia has entered Angela's house in a 'Tidy Home' competition, so Angela goes out to buy flowers while Old Tom tidies up his room. Angela specifically reminds him that ""not a thing must be left on the floor."" Unfortunately, Old Tom takes this literally and, with the help of Lucy, he takes everything off the floor in the house and throws it into the back garden, where they attempt to hide it by wrapping it all in curtains. When Angela returns home with her flowers she is shocked to see the place barren, and faints. Then the judges arrive. But far from being shocked, they are impressed by the bare floors and, especially, the big 'sculpture in the back garden. Angela's house wins first prize.

It's Angela's birthday and Lavinia has several treats planned for her. But she is annoyed that Old Tom is coming, too - especially when he gets them thrown out of a café. At Lavinia's next treat for Angela - a trip to the skating rink - Old Tom goes wild in a zamboni and covers Lavinia in ice. Furious, she refuses to let Old Tom go to the next treat - he has to stay with Lucy, instead. When Lucy decides to play dress-ups, Old Tom realises their costumes are so good they can follow Angela and Lavinia in disguise. They see Lavinia and Angela try to get into Lavinia's final treat for Angela - the -studded opening of a new Cineplex. However, the doorman rejects them for not being stars. So, Old Tom, posing as a celebrity, manages to get Angela and Lavinia into the opening.

While playing frisbee, Old Tom accidentally breaks Angela's favourite record by her favourite singer, Tom Moans. Old Tom and Lucy try and buy a replacement copy, but it's impossible to find. When they learn Tom Moans is performing in town, they try and buy Angela tickets to the show, but it is sold out. Instead, they go backstage and try to get Tom Moans's autograph, but find him in tears - he has lost his chest hair wig, and won't perform without it. Old Tom has an idea. Lucy rushes off and brings Angela and Lavinia to the show. Angela wonders how Lucy got free tickets, so Lucy points to Tom Moans's orange chest hair. Angela looks through her binoculars - the chest hair is really Old Tom!

A rather ordinary magician, called Morton the Affordable, is entertaining Billy's birthday party - not very successfully - until Old Tom's antics disrupt the party, and Morton's assistant quits. Morton desperately needs a new assistant for his appearance on an important TV show, and he picks Old Tom. This makes Billy jealous and, just before the show, he locks Old Tom in one of the magician's boxes and takes his place as Morton's assistant. The performance starts badly, until Old Tom escapes from the box and turns the magic act into comic mayhem. The audience is so amused that Morton becomes a big success and discovers the art of showmanship from Old Tom.

Angela won't let Old Tom keep his new pet - a goat. However, instead of taking it back to where he got it from, Old Tom hides the goat in his room. Meanwhile, to make up for the pet, Angela buys Old Tom an insect-eating plant. To his dismay, the plant won't eat insects but, when his back is turned, it eats the food off his plate and grows bigger. When the plant tries to eat Angela, Old Tom rescues her in the nick of time and they flee the house. Meanwhile, Lavinia arrives, not knowing about the carnivorous plant. Angela and Old Tom return just as the plant is devouring Lavinia, and they manage to rescue her. At that moment, Old Tom's goat escapes from its hiding place and eats the plant.

Angela buys a birthday present for Lavinia - a parrot. But while she goes out to buy some birdseed, Old Tom lets the bird out of the cage. Angela returns home to find Old Tom and Lucy chasing the bird around the living room. They almost catch it, but it escapes through the chimney. Then Lavinia arrives. Angela pleads with Old Tom and Lucy to catch the bird, while she keeps Lavinia busy. Old Tom and Lucy build a home-made flying machine so they can fly after the bird, but it keeps outsmarting them. Finally, Old Tom catches the bird with his net, but he falls out of the flying machine. The bird and Old Tom tumble down Angela's chimney and land back in her living room. Lavinia is delighted with her present but, because she believes animals should be free, lets the bird go.