Gavin and Stacey finally plan to meet up. Stacey's guardian uncle, Bryn, is concerned as ever for his niece's well-being and provides her with a rape alarm for her visit to London. Gavin's mum, Pamela, is very excited for her "little prince", while his best mate, Smithy, is skeptical and more concerned about what Stacey's mate, Nessa, is going to look like. Nessa, meanwhile, couldn't care either way.

Gavin and Stacey are happy and in love, until a misunderstanding on the phone at work leaves Stacey broken-hearted and Gavin in a state. Gavin decides there is only one way to solve the problem and drives all the way to Barry Island to talk to Stacey in person.

Gavin and Stacey prepare to tell their friends and family about their surprise engagement. Pamela and Mick are delighted for their "little prince", but Stacey's family have some very big concerns about the announcement, and Smithy refuses to even talk to Gavin.

With just six weeks to go until the wedding, the nerves and excitement are beginning to show. Gavin has a very important question for Smithy, while Nessa is having uncharacteristic doubts about herself.

It's Gavin and Stacey's respective stag and hen nights. Stacey is delighted when her brother Jason returns home - but there is definitely something very awkward happening with Uncle Bryn. Meanwhile, both Nessa and Stacey are hiding big secrets. Will Gavin ever discover Stacey's secret past? And if so, will he still want to marry her?

The day of Gavin and Stacey's wedding has finally arrived, and the Shipmans and the Wests are beside themselves with excitement and pride. Smithy attempts to deliver the definitive Best Man's speech, but it doesn't go quite to plan. Uncle Bryn is still acting strangely around Stacey's brother Jason, and Nessa is acting the oddest of all: will she spill the beans on her big secret? And, most importantly of all, will the wedding actually take place?