Episode 1
Three weeks after their wedding, Gavin and Stacey return from honeymoon. Pam and Mick are there to pick them up and take them to the family home in Essex, where they will be living until they get their own place. Gwen and Bryn travel to Essex to see the newly-weds, with Nessa following close behind in a seven-ton truck full of Stacey’s belongings. Smithy arrives, clearly upset that Gavin did not call him during his honeymoon (or “holiday” as Smithy prefers to call it).
The families decide to celebrate by going to the Shipmans’ local Italian restaurant, where they discover Dawn and Pete having a meal with a Ghanaian man they hope to introduce to their “bedroom”. The evening starts well until Stacey collars Nessa in the toilet and finds out she has not told Smithy that he is the father of her unborn child. Gradually, more and more of the diners find out about the pregnancy until, eventually, Nessa tells the last person to know – Smithy.
Episode 2
Picking up immediately after the end of Episode 1… Reeling from Nessa’s revelation and unable to handle the news, Smithy flees the restaurant. While Gav, Mick and Bryn set out to find him, Stacey is upset to find out that Gwen has redecorated her bedroom, and it finally sinks in that her home is now at Pam and Mick’s, and not in Barry.
After calling on Smithy’s sister (who works in a fast-food drive-through), the lads manage to track down a pensive Smithy at the golf driving range and convince him to come back and stand by Nessa. She, however, is reluctant to have Smithy involved with her child at all, but eventually agrees that he can come with her for her scan.
Stacey gets upset again when she finds out all of her possessions have been brought in the back of Nessa’s truck. And when her family leave to head home to Wales, she feels she should be with them – and there for her pregnant best friend, Nessa.Episode 3
Stacey feels dejected because she cannot get a job and Pam tells her she needs to get out more. Smithy needs Gavin’s shoulder to cry on because his girlfriend split with him over Nessa’s pregnancy and told him she was seeing a younger man anyway.
Gavin, Stacey and Smithy head for Barry so that Smithy can go for the scan with Nessa. Smithy lodges with Bryn, who has turned his spare room into a gym and sets about getting Smithy into shape. Gavin walks elderly next-door-neighbour Doris home, who tries to entice him in for a “coffee”.
Gavin and Stacey accompany Nessa and Smithy to the hospital for the scan. Seeing the image of their child for the very first time, really drives home the reality of the situation for the young parents-to-be.Episode 4
Everyone is very excited because Mick is going to be interviewed on the news after discovering a body near his work place. But when the excited Essex and Welsh contingents all sit down to watch, there is massive disappointment – Mick’s interview has been cut down to just a few seconds.
Stacey is miserable and homesick because she still hasn’t got a job, or her own home. She feels she’s getting under everyone’s feet, especially when Pam interrupts her during her shower. Gavin tries to console her but she says he just doesn’t understand. Pam admits to Dawn that having the newlyweds staying in her house is getting a bit much. (Dawn and Pete are still looking for a threesome.) Gavin and Stacey go to view a potential flat and are shown round a tiny, dirty studio by over-enthusiastic estate agent Duncan (Marc Wootton).
Nessa travels to Essex and joins Smithy, Gavin and Stacey for a night of tenpin bowling. Gavin and Stacey spend the night arguing. Nessa and Smithy end the night, once again, in the throes of passion – after a KFC (Kentucky Fried Chicken) meal.Episode 5
Stacey and Gavin are still in conflict over where they should live…with Gavin refusing to even consider the idea of living in Barry. Smithy admits to Gavin that he had another fling with Nessa and realises he’s going to have to face her again at the surprise party Bryn is throwing for Gwen. Bryn is panicking because he wants to keep the surprise barn-dance themed party a surprise…but he’s also having trouble getting enough people to attend. Stacey thinks she’s going down early with Gavin to help Bryn, then finds out he intends to travel later with Smithy. They row again and Stacey heads to Barry alone by train.
The barn dance is a great success to the relief of Bryn, but Smithy’s meeting with Nessa is awkward as she is sat with her old flame Dave the coach driver…and it is made clear that Smithy’s is not wanted. Gavin and Stacey argue again, but this time it’s serious…she’s not going back to Essex with him.Episode 6
After falling out at Gwen’s surprise barn dance, Gavin and Stacey are still living apart and in their respective home towns. Pam is up in arms against plans for a new phone mast to be erected near the Shipman house, and is planning a sit-in at the site. Pam is also concerned about Gavin and gets Mick to phone Gwen to find out how Stacey’s doing.
Nessa is earning some money on the side by performing as a living statue down the high street. Bryn breaks down and tells Jason that Dave the coach driver knows all about the fishing trip.
Gavin seeks counselling for his marriage troubles from Smithy, but Smithy’s idea of relationship therapy is to organise a surprise lads night out at a nightclub foam party. While the lads are knee deep in foam, Stacey is with her family at a bingo night. Neither she, nor Gavin are enjoying their evening out and can’t stop checking their phones to see if the other has called. Eventually, Gavin can’t carry on without calling Stacey. They speak…and make up again.