In the final episode, it’s the day of Gavin and Stacey’s wedding, 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?