Gavin and Stacey star Melanie Walters said one moment in the festive script made her “scream out loud” when she read through for the first time.
Walters, who plays Stacey’s mother, Gwen West, said: “When it came through the post I had, of course, conjured up many a possible storyline, none of which came close to what was written.
“Our director Chris Gernon had warned me that there would be a moment that, when reading the script, I would scream out loud and she was right.”
Could this be the moment where the truth about the infamous ‘fishing trip’ – which Uncle Bryn and his nephew Jason are so secretive about – is finally revealed?
The UK will have to wait until Christmas Day to find out.
Mathew Horne, who plays Gavin, said the show’s Christmas special will be “nothing short of a masterpiece”.
The 46-year-old said the script for the sitcom’s final episode made him laugh and cry, and said the finished product “hasn’t disappointed”.
“I want to say I was nervous about reading the script as it’s always been Ruth (Jones’) and James (Corden’s) priority to get the script perfect in the first instance, to tell a story the right way,” he said.
“[The script] made me laugh, it made me cry and upon completion, I thought it was nothing short of a masterpiece,” Horne said, “not just in terms of an episode of Gavin And Stacey, but frankly any script I’ve ever read.”
Speaking about crafting the script, co-writer Ruth Jones, who also plays Vanessa “Nessa” Jenkins, added: “It was a mixture of excitement, nostalgia and sadness.
“Sad of course because this is the last time these characters will ever be on screen again, but so exciting to bring them to life again,” she said, “And nostalgic because we’d be on set with the cast and we’d go down memory lane remembering the early episodes.
“We often reminisced about Maggie John (who played Doris O’Neill) who is no longer with us, but we felt she was in spirit, especially when we were on Trinity Street.”
Jones’ co-writer, James Corden also spoke about a documentary, which will air on New Year’s Day, featuring behind-the-scenes footage.
“The documentary really is based on this idea that we just had so much footage, from our first ever day, from the first Christmas special and from series two and three,” Corden said.
“For the 2019 Christmas special and on this finale, we had a film crew following the entire time. It’s very emotional watching everybody because the very last thing that we shot is the very last moment of the show.
“So there were a lot of tears that day and I hope that people that like the show will enjoy getting a little glimpse into it.”
The hit TV series aired between 2007 and 2010 and returned in 2019 with a one-off festive special, which ended on a cliffhanger when Nessa proposed to Corden’s character, Smithy.
Gavin And Stacey: The Finale will air at 9pm on Christmas Day on BBC One and iPlayer. The documentary Gavin And Stacey: A Fond Farewell will be shown at 7pm on New Year’s Day on BBC One and iPlayer.
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