Nessa and Dave's wedding approaches; Stacy breaks some life-changing news to Gavin.
Gavin's family comes to Wales for a holiday.
Gavin is uncomfortable with Gwen and Bryn's knowledge of his sex life; Pete and Dawn prepare to renew their vows.
Stacey is thrilled to be at home again; Smithy misses Gavin.
As series two of Ruth Jones and James Corden's award-winning comedy draws to its conclusion, Stacey returns to Essex to salvage her marriage. Meanwhile, Nessa goes into labour a month early in Barry, and the newlyweds must forget their differences to track down Smithy in time for the birth of his child.
The newlyweds find themselves leading separate lives back in their home towns. In Essex, Smithy makes efforts to remind Gavin of the excitement of his bachelor years with a traditional boys' night out. Meanwhile in Barry, Stacey attempts to distract herself with a trip to the bingo.
Bryn is thrown off when a surprise guest show up at Gwen's birthday party; Stacey continues to struggle with homesickness.
House-hunting doesn't go as well as Stacey and Gavin had hoped; the newlyweds join Smithy and Nessa for a night of bowling.
Tired of lying around the house all day, Stacey tries to find a job to fill her time; Smithy and Nessa prepare for their first sonogram.
Smithy goes missing following Nessa's shocking revelation, and the boys attempt to track him down to persuade him to accept his responsibilities. Meanwhile, Stacey is forced to contemplate the consequences of transforming her long-distance relationship with Gavin into a functioning marriage
Gavin and Stacey return from their honeymoon; Smithy discovers he has bigger things than the tension between him and Gavin when Nessa makes her big announcement.
It's Gavin and Stacey's big day and after the ceremony everyone hits the open bar at the reception; Nessa considers coming clean to Smithy about her pregnancy.
The bride-to-be goes on a hen party, while Gavin embarks on two stag nights, the second of which reveals shocking secrets about his fiancee that could jeopardise the wedding. Elsewhere, the early return of Stacey's brother Jason horrifies Uncle Bryn. Mathew Horne and Joanna Page star.
The Shipmans drive down to Wales for the wedding fayre, and after a momentous trip to the church for the reading of the banns, Nessa tells Stacey her big secret. Comedy, starring Mathew Horne and Joanna Page
Gavin and Stacey's families get together for dinner to discuss wedding plans as Stacey tries to keep a secret from her past hidden.
Gavin must get through Stacey's family before declaring his love for her; Stacey spends the night at Gavin's house and gets to know his family and friends.
Comedy about the romance between a twentysomething couple with differing cultures and backgrounds, their friends and their families. Their friends and family also come under the spotlight, including Gavin's occasionally volatile mother Pam and the pair's best pals Nessa and Smithy, who get along swimmingly - but only when they're drunk. Mathew Horne and Joanna Page star alongside Rob Brydon, Alison Steadman, Ruth Jones and James Corden.