Brian turns himself into a super hero. Josh won't act as his sidekick so Brian brings home eight-year-old CJ. Soon, the new boy is Brian's biggest fan – but alarm bells start to ring when CJ reveals he wants to stay on as part of the family.

Mel notices a hunky boy who seems to attract all the girls. He seems to know her too – but there's a shock in store for her when she discovers who he really is. She persuades Sophie to morph into a girl from school (played by Lucinda Rhodes-Flaherty of KateModern fame) and gets her to find out more about him. It turns out to be Andy The Freak. After Frankie and Pete refuse to hang out with Josh, he investigates and find out that they attend a stamp collecting club. He then hesitates to be seen with them, fearing people will think he too is a stamp collector. Mel bans Brian from playing with CJ, fearing he will 'break' him as he does with everything else. However, whilst playing pirates, Brian breaks CJ's leg after knocking him off the top of the sofa with a plank. Continuing to play pirates, Brian then goes onto bury all his 'treasure' including the TV, fridge, Microwave, and CJ.

Mel goes into training to become an ace pool player, so as to be able to play with the boys. Brian gets in touch with his 'feminine side'.

Brian is turned into a vampire for Hallowe'en and targets teacher Whiteside as his first victim, while Josh and Pete vow to take revenge on Poppy Manning for scaring them last year. Sophie finds a love letter that Mel has written to Trent and concocts a plan to bring them together

Dissatisfied with the level of affection his foster son is prepared to show him, Brian creates a robot double of Josh... and causes total chaos. The robot Josh in one scene parody's Johnny from The Shining.

Sophie starts to read fairy tales and soon notices that having a wicked stepmother is a necessary first step on the road to living happily ever after. Determined to ensure the children enjoy a blissful old age, she starts behaving in a thoroughly nasty fashion

Brian kills a spider and is so ashamed that he sets up an animal sanctuary – in the house. Sophie suspects Lucy has a secret boyfriend called Derek

Brian gives Mel an alien-style makeover in the middle of the night, but the effects prove short-lived

Josh finally manages to land a date with gorgeous Tania Thomas, the girl of his dreams, but it soon goes all wrong after Brian & Sophie have created a super strong glue mixture. This is one of the two episodes where the Bathroom in the Barker-Johnsons household is seen.

Brian looks for meaning in his life and invents a religion (which he names Brianism), while Sophie becomes obsessed with celebrity magazines. Lucy objects to CJ saying a certain word, so he tricks her into saying it herself

Josh's latest scheme ends in detention after he sells a computer password to Frankie, while Brian watches a series of sci-fi films and discovers the general public believe aliens to be bad guys – so he sets about changing people's opinions.

The children are outraged to discover Sophie has put them up for sale on the Internet – and what's even more mortifying is the price she's asking. The family also get involved in the school charity fair, where Mrs Hardman ends up dancing with three different Joshes.

Brian makes his first ever visit to the dentist – with predictably chaotic consequences. And Sophie tries out a bit of body improvement. She has blonde hair, a tan, a purple dress and very large breasts.

Lucy grumbles that her school work is too easy, but is horrified when Brian and Sophie tell her teacher about her complaints. Brian organises a break-in into the school in order to procure Lucy's school report, while Josh sets up an online dating agency and Mel encourages Trent to emphasise his masculinity

Josh builds up his muscles to impress a sporty girl, but Brian's attempts to help him land a date with her end in disaster. Sophie leads a classroom revolt against her teacher, and Trent blackmails Mel over a pair of pants.

Brian decides to take up a hobby and begins collecting spoons. Mel tries to express her feelings for Trent by putting together a tape of songs while Sophie becomes a rapper and disrupts the school concert with a raucous performance.

Brian adds canned laughter and sound effects to the house after watching too many sitcoms, even arranging a series of slapstick disasters in a bid to make Mel smile. Josh tries to steal Lucy's limelight in a painting competition and Sophie works as a toenail fairy.

Brian and Sophie are equally disturbed to learn the children will eventually grow up and leave home. So, Brian (with help from CJ) decide to ruin Mel & Lucy's hopes of future success and Sophie (acting all tough) gets the Barkers to train harder to feel more brave and strong to the outside world.

Brian is excited about what he will get for Christmas until he finds out that Santa has a "naughty" list, and he's afraid that he may be on it. Meanwhile, Sophie is trying her best to find out what Lucy has got her for Christmas and Josh is looking after Frankie's present from Pete.

In order to mend his friendship with Pete, Josh goes to the store and buys the last Samurai sword they have left, but once again it is accidentally broken. Brian aims to become to best Santa ever in town and things look bad for Christmas until the real Santa shows up.

Josh, Pete and Frankie are in competition for the attention of a new girl in school, but there's a surprise in store for one of them when they discover who she is. Mel has left for Canada and Brian is suffering in her absence, so takes matters into his own hands by getting a 'new Mel' from the children's home, while Lucy is enjoying having a room to herself, which soon changes as CJ starts launching desperate attempts to move in, even resorting to 'becoming' a girl!

"Great Versace's ghost!" Brian cries as he takes the role of fashion designer and forces the children to wear his fruity clothes and curtains. Meanwhile, Sophie collaborates with Josh in yet another fraudulent scheme, this time a pet selling scam involving a pot bellied pig, and a lot of icecream...

Harry gets angry with Sophie for not providing for her properly, even though she is doing the best she can. The example of this is Cold Scrambled eggs. This gives Sophie the idea of opening a hotel, so that she can at least get paid for running around after people. Guests start to arrive at the house, and Brian causes chaos by messing with the central heating.

Josh and Brian vie to see which of them can tell the scariest Hallowe'en story, but Sophie can't understand why it's fun to be frightened.

After CJ nearly chokes on a gobstopper, Brian decides to learn some first aid in order to keep the family safe. After injuring the school nurse, he morphs into the replacement and Mr Whiteside falls in love with him. Josh meets a girl but when he realizes that she is a psycho, pretends to be gay, going out with Pete until he finds out that she is rich. Lucy tells the girls in her class that she wants to get her nose pierced making her instantly popular... until she reveals that her piercing is a fake! Because of this piece of metal she goes from −100 to hero...and straight down again!!

After worrying that he will not be remembered when he dies, Brian goes on a quest to find the Holy Grail with CJ. Josh participates in work experience at the diner. Wendy and Lucy start a company producing potato powered clocks, and Sophie helps make them, however, she is told off by Lucy for giving them all away free. Sophie then founds "Sophie.com International" which sells useless coconut toys, yet these are a hit. Her business is about to go international until Lucy discovers she is enslaving children to make the toys.

Harry signs up for a boxing tournament after Trent says girls shouldn't compete in the sport, but her confidence takes a knock when she sees her opponent. Brian is bullied by a little schoolboy and Sophie dresses up as a hamburger.

Sophie tries to help Josh woo Tania by turning him into a talented musician. Brian is introduced, by CJ, to the ancient Roman concept of fascism and quickly imposes his own absolute rule on the household to get his way – idea of democracy and declares himself emperor of the household.

When Harry cooks Brian and Sophie a romantic meal to help them patch up their differences after an argument, the aliens quickly go to the other extreme and become totally wrapped up in their passion for one another, (much to the children's embarrassment). However, when Josh tries to cool their ardor, Brian becomes convinced that he's trying to steal Sophie's heart. Meanwhile Lucy is up for a prize at school... until Brian and Sophie take it too far.

Lucy is due for a vaccination at school and it becomes evident that uncharacteristic though it may be for her, she is dead scared. After Mr Whiteside pickpockets Josh's music player and drops it in his tea, Josh uses Brian and fixes everyone's electronics for £5. Mr Whitside also asks him to fix his. Brian ends up destroying everything, including Mr Whiteside's gadget! Sophie gets into photography and pursues all the kids around the house in attempt to get some candid shots. But when she takes it upon herself to capture Lucy's fear as she waits for her injection at school, she unwittingly motivates the kids to turn the tables on her. Brian, fed up of always being criticized for his behaviour, decides he is only going to do as he is told and adopts an attitude of total subservience. But he can't anticipate how complicated it can get when he tries to obey orders from one person, especially when that person is Josh.

Sophie decides that she must become a nanny in order to see more of the children. Meanwhile, Mr. Whiteside thinks he's seen a ghost after Brian morphs into the spitting image of a long-dead former school headmaster. Lucy, worried about a test, downloads an alien virus into the school computers however this takes a downward turn.

Confused by ideas of right and wrong, Brian decides wrestling is the best way to settle arguments. Meanwhile, Sophie is given the opportunity to eavesdrop on Whiteside's private moments.

All the children are revising for exams (apart from Josh – obviously, he has stolen all the answers already). Then, Josh finds out that he has won a year's supply of chocolate. Brian is delighted and becomes addicted to it, but all the children ban Brian from eating anymore. Brian is furious when a tube of chocolate falls out of Josh's pocket and he finds out Josh has been eating chocolate when he can't. So he declares: "If I can't have chocolate, then no-one can!". He sets himself up as a South American military dictator, prohibiting "chocolate and/or cocoa related products", and enforcing the ban with by imprisonment and torture, notably on CJ. Meanwhile Lucy tells Sophie that sometimes stress can help people perform better, so Sophie becomes an Austrian psychoanalyst, stressing Lucy with seemingly random violence and explosives.

Josh needs an alibi from Harry to cover himself from some misdemeanor, but Harry of course refuses. Trent advises him he might have more success if he broke a habit of a lifetime and tried being nice to her. He gives it his best shot-but to no avail. Sophie causes Lucy yet more embarrassment-this time at the swimming baths where she makes a fool of herself sinking instead of swimming. Sophie takes herself off to the river to practice and morphs a spectacular tail but fails to morph back owing to the pollution of the water. As a result the family have to cope with a new Sophie in mermaid mode. And she has a spectacular effect-not least on Andy The Freak. Fed up with losing to CJ from Hide-And-Seek, Brian changes the geography of the house and causes chaos for the whole family. This is the only other episode where the bathroom in the Barker/Johnston household is seen.

Brian's hostile behaviour puts the family at loggerheads with their new neighbours, Brian doesn't get on well with them since he eats their roses (calling it 'The War Of The Roses') – which proves unfortunate for a love struck Lucy.

Brian buys a racing pigeon for Harry. The pigeon is called Humphrey and Harry likes him for the outset. When Humphrey goes missing, Brian is blamed, so he tries to make things better by morphing into Humphrey himself. Meanwhile, Sophie morphs into Josh and sets up a stall selling stolen medical supplies. This gets Josh into a massive amount of trouble but Sophie saves the day by making Mr. Whiteside let Josh out of the punishment. When this problem is sorted there is one more problem to be solved, Harry entered Brain as a pigeon into a race where he has to make it home again from the starting line and he hasn't found his way home for days. Three days after Brian was sent into the race he returns to find that everyone loves him and is glad to see him.

Harry does her best to stop Brian and Sophie inviting Trent's parents to tea. Harry learns a "shocking" secret about Trent, Sophie gets into growing vegetables and Brian gets into football.

Sophie learns about gossip and thinks that Mrs. Hardman and Mr Whiteside have fallen in love with each other. Brian finds a human toe in his can of cola and finds out the drink was faulty and complains before he tests CJ’s eyes and discovers that he too is ‘faulty’. Josh competes in a snail race against Poppy, and the winner gets £5. Josh is convinced he'll win but when his snail is about to win Mrs Hardman comes in and Josh accidentally sits on his snail (Lenny) killing it.

Sophie has discovered how pollen from flowers can give you hay fever and almosts destroys all plants. But with an explanation from Lucy about how flowers are good for the atmosphere and for bees to make honey, Sophie decides to set up a bee sanctuary in the house. Meanwhile, Brian (morphed as Josh) has ruined Josh's reputation by becoming Mr. Whiteside's school monitor and putting people like Harry, Frankie and his date Tania Thomas in detention.

Mel finds out that the children have or had an aunt and uncle in Canada who look suspiciously like Brian and (the original) Sophie. They confront Brian and Sophie, who admit that, seven years ago, they met Josh, Mel and Lucy's aunt and uncle at the children's home – and then, after the aunt and uncle realized that they were aliens, the aunt and uncle were kidnapped and kept in suspended animation in the attic for seven years. The children insist that they let them free. Meanwhile, Wendy discovers Brian and Sophie are aliens, and she tells Pete and Frankie too, so Brian wipes their memories. Everyone realizes that it is time to move on. Josh, Mel, Lucy, Harry and CJ all move to Canada with the real Brian and Sophie Johnson, and the aliens appear to go back home to Valux; however, Brian presses the big red button that caused the pair to crash-land on Earth in the first place setting the stage for series 8. They land by the sea and then head for the foster home.