After his initial angry reaction to Stacey's news, Uncle Bryn agrees to drive the family to Essex to meet the Shipmans. Pam lays on a cracking spread and the party goes with a bang. Then Gavin and Stacey make an announcement that throws the bonhomie out the window.

Stacey's brother Jason arrives home early, much to Uncle Bryn's horror. Stacey has her hen night and Gavin has two stag nights, the second of which reveals something about Stacey that could jeopardise the whole wedding.