Cathy and Colin have returned from a luxury cruise and seem strangely keen to persuade neighbours Eric and Beth to join them on their next trip. However, it soon transpires they have an ulterior motive - getting hold of a cheap deal. With Eric and Beth politely declining, the determined couple have another target in mind. Christine, fresh from a PPI refund windfall, wants to crow about her good fortune, and Beth is railroaded into holding a celebratory barbecue - the perfect moment for the holiday hunters to pounce.
The neighbours are woken in the middle of the night when a car alarm goes off. After meeting Eric in the street whilst searching for the source of the noise, Colin and Christine invite themselves to the Baird's for a cup of tea, with Cathy and Sophie not far behind. Soon, an impromptu late night party is underway, despite the unwilling hosts just wanting to go to their beds.
Beth's hopes of a nice traditional Sunday lunch collapse when Cathy and Colin arrive in the midst of an argument, Jaz locks himself in the toilet, and uninvited guests Christine and Sophie turn up to enjoy the lovely roast lamb and organic potatoes the Bairds have been preparing all morning.
Cathy invites the neighbours round to enjoy an extravagant spread of posh shop-bought nibbles to celebrate Colin's dad's birthday. Despite her big show of being the ultimate hostess, long-suffering Beth has to step in and rescue the party. Birthday boy Willie isn't impressed by any of it, but finally gets into the party spirit when Colin presents him with his old accordion.
Technophobe Christine faces a computer crisis when she goes online to buy a Barneyboo Buggy for Sophie's baby and her screen freezes mid-purchase. She heads to the Bairds to get help. Beth has got more company at home in the shape of Ian and Jaz, who are staying while they wait to pick up keys for their new flat, and footie fans Colin and Eric are getting excited about their trip to watch Scotland play in Latvia.
Beth has organised the perfect baby shower for mum-to-be Sophie. Everyone is invited and Christine has even asked Pat from over the back, who she is assuming is going to be the baby's godmother. Sophie, however, has already asked Beth and Eric and hasn't yet broken the news to her mum. Jaz is sporting a black eye after a run-in with a packing box, and whilst Cathy is excited by the idea of a party, she doesn't want to get too close to Sophie in case the birth happens earlier than expected.
There's tennis trouble in store for Eric and Colin - and they haven't a sporting chance against Christine.
It's Eric's birthday coming up and all he wants is a bit of peace and quiet. Cathy and Colin decide to pop in early as they're going to be away 'sailing'.
The Bairds have booked their first holiday in 7 years but Cathy and Colin are hosting a party to show off their new hot tub and insist that everyone is there.
Because Eric left the freezer door open, Beth decides she has to cook it at once and invite everyone over to eat it all.
A domestic disaster leads to Christine becoming Beth and Eric's house guest.
Christine just wants to know who the father of her daughter's baby is, but Sophie won't tell her. So Christine locks her in the hut.