Smithy can’t wait to spend his first Christmas with baby Neil, but doesn’t count on Dave Coaches tagging along and playing happy families with Nessa. Jason and Bryn, meanwhile, have a heart-to-heart about “that” fishing trip and Gavin and Stacey’s revelation to Pam and Smithy doesn’t quite turn out to be the Christmas present they were expecting.

Mick is played by Larry Lamb, Smithy by James Corden, Dave Coaches by Steffan Rhodri, Nessa by Ruth Jones, Jason by Robert Wilford, Bryn by Rob Brydon, Gavin by Mathew Horne, Stacey by Joanna Page and Pam by Alison Steadman. Melanie Walters also stars as Gwen.

Gavin & Stacey is simulcast on BBC HD – the BBC’s High Definition channel available through Freesat, Sky and Virgin Media. With up to five times more detail than standard definition television, HD provides exceptionally vivid colours and crisp pictures to make Gavin & Stacey Christmas Special a truly cinematic TV experience.