The day to day life's of three orphaned children who are adopted by aliens that have trouble adjusting to the local culture.
Brian offers to get Josh a date with one of the school's fittest athletes, but things do not work out as planned.
At first, Brian is taken with the democratic ideals of the ancient Roman Senate, but when things stop going his way he turns into the equivalent of a Roman Emperor and imposes his will on the household.
After Trent says that girls can't be boxers, Harry signs up to compete in a tournament. Then, when her first opponent looks like a shoo-in at twice her size, Josh sees an opportunity to make some money.
After worrying that he will not be remebered when he dies, Brian goes on a guest 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 Sophiecom International which sells useless coconut toys, yet these are a hit. Her buisness is about to go international until Lucy discovers her secret!
Brian doesn't notice CJ choking, so at Harry's suggestion decides to become a nurse, whereas Sophie becomes a photographer, Josh fights off a would-be girlfriend, and Lucy considers having her nose pierced so as to become "cool."
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.
Harry has been asking Sophie to do everything for her and Sophie is fed up with it. Lucy tells Harry that this is not a hotel and then Sophie gets an idea to make money and run a hotel though she hasen't thought a lot of it through.
Sophie helps Josh with a fake pet marketing scheme. Meanwhile, Brian has decided he can make a success of it in the fashion industry, but his style is totally wrong.
With Mell having gone to Canada, Brian and Sophie go to the children's home to find a replacement - Harry. Meanwhile, without knowing that she is his sister-to-be, Josh falls in love with Harry - a recipie for trouble!
After a visit from the ghost of his maths teacher's grandmother, Josh begins to mend his ways. But will he take Lucy's side over Santa, and risk not getting the mobile phone he wants for Christmas?
The aliens try to understand Christmas, but become confused about whether Santa really exists and who Lucy is playing in the school nativity play.
When the aliens discover that the children will eventually leave home, Brian makes his mind up to do everything possible to stop them.
Brian attempts to cheer Mel up with a string of comic disasters after taking his inspiration from classic TV comedy shows. But he does not count on the effect they have on her.
Brian acquires a new hobby - spoon collecting. And Sophie becomes a rapper.
It's either feast or famine for Brian and Sophie in the love arena. First, they have an argument and stop speaking to each other. Then, after the children set up a romantic dinner for them, they start irritating everyone with their displays of mutual affection.
Brian organises a break-in into the school in order to procure Lucy's school report.
Brian makes his first ever visit to the dentist - with hilarious results. And Sophie tries out a bit of body improvement.
The kids are outraged to discover that Sophie has but them up for sale on the internet - but what's worse is the price that she's put on each of them!
Brian discovers from a season of sci-fi movies on television that aliens are always shown as evil monsters. He sets about convincing the world that aliens are actually good guys.
Brian looks for meaning in his life and invents his own religion. Sophie is busy worshipping celebrities but soon turns into a celebrity herself.
Josh at last manages to get a date with the gorgeous Tania Thomas, but when he turns up accompanied by Sophie, disaster isn't too far off.
In the middle of the night, Brian performs an alien beauty make-over on Mel - but will it last?
Brian kills a spider - and he's so shocked that he sets up an animal sanctuary... in the house!
Sophie starts to read fairy tales and discovers that if children are to live happily ever after, their stepmothers need to be really evil. She tries out the part and finds that it suits her.
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.