As Stacey doubts if her love for Gavin is real, Nessa goes into labor and Smithy is nowhere to be found.
Gavin and Stacey's return is overshadowed by Nessa's big news.
Smithy disappears after being told he is to become a father; Stacey must adapt to life in her new home.
Stacey, Gavin, and Smithy head to Barry for Ness' scan.
Mick becomes a minor celebrity for the night, Stacey and Gavin start house-hunting, and Nessa visits Stacey and shows the others a thing or two at the bowling alley
It's Gwen's birthday and Bryn has arranged a special treat, but things take a surprising turn when an uninvited guest turns up, and Stacey tells Gavin of her big decision
Gavin is in Essex without his wife and Stacey is in Barry without her husband, so while Smithy plans a boys' night out, Stacey goes to the bingo, but has living separate lives finally taken its toll on love's young dream?
