The last episodes of the final series formed a significant part of the prime time BBC seasonal programming, and were broadcast on Christmas Day 2009 and New Year's Day 2010.
Gavin & Stacey was acclaimed as a hit breakthrough show for BBC Three, becoming the most nominated show in the 2007 British Comedy Awards.
Despite their dislike for each other, they have several one-night stands, leading to Nessa becoming pregnant and having their baby.
Whilst Gavin and Stacey are the clear main characters, towards the end of the show's run, the dramatic emphasis switches slightly from them, as they resolve their distance issues, to Smithy and Nessa, as Nessa becomes engaged to another man.
The second series begins with the newlyweds arriving from a honeymoon in Greece.
The in-laws meet again at the Shipman's house in Essex, where Nessa has some shocking revelations – especially for Smithy, who learns that she is pregnant with his baby, and although he makes it clear he thoroughly dislikes the woman, he is generally civil and supportive towards her about their child.
Pam, Mick and Stacey hurry across to Wales, whilst Gavin rushes to find Smithy with Smithy's sister, Rudi (Sheridan Smith), eventually finding him in the pub watching football.Other prominent cast members include Alison Steadman and Larry Lamb, who play Gavin's parents, Pam and Mick, and Melanie Walters and Rob Brydon, who portray Stacey's mother, Gwen, and her uncle, Bryn.The show was produced by Baby Cow Productions for BBC Wales.A US remake titled Us & Them was scheduled to air on Fox in the 2013-14 US TV season, but was shut down mid-production and no episodes were broadcast.The show follows the romance between Gavin, from Billericay in Essex, and Stacey, from Barry in the Vale of Glamorgan, Wales.Meanwhile, Gavin and Stacey, living at Pam and Mick's house, run into trouble when Stacey struggles to find a job and becomes home-sick for Barry and her family.