To celebrate, Channel 5 recruited Dallas celebrity super-fan John Barrowman to travel out to the iconic Southfork ranch, meet cast members old and new and get the inside scoop on the resurrected series.
In our interview, John talks his big ol' Texas experience, his childhood memories of the original Dallas and whether or not we could ever see him pop up on the new show in an acting role...
How did you get involved with this project?
"Well first off, I've been a huge fan of Dallas for years. Apart from being a big fan of sci-fi, I'm also a big fan of '80s drama. When I was a kid growing up in the States in the late '70s / early '80s, as soon as Dallas came on on a Friday night on CBS at 9pm we stopped everything from that moment on as a family. We mapped our Friday night around Dallas.
"These were the days before VCRs and digital television so you had to watch it when it was on. I became a huge, huge fan of the show. Then I was approached by Channel 5 to see if I wanted to make a TV programme and they asked me, 'What would it be about?'
"I said, 'I hear they're doing a remake of Dallas'. I've written about it in my first autobiography as it's related to my growing up and they said they'd love for me to do it. So I went off on a journey to meet the past cast and also the new cast to see if the show will still have the sparkle with the older cast members and to find out also if the new cast members have what it takes to be Ewings."
What was it like getting to visit Southfork and meet the stars?
"It was amazing - Southfork itself is an iconic ranch in Texas outside of Dallas. Just to be there and see it... like everything it looked bigger on television. But to drive through the gates... I never thought that would happen.
"Meeting the cast was incredible. I mean, Larry Hagman... I actually went to Larry's house in Malibu and we had a nice afternoon. He gave me a Stetson that was signed and I got a pair of his boots.
"Patrick Duffy and I had brisket - I had lunch with him sitting in the patio of Southfork by the pool. Linda Gray - I wanted to dress like a cowboy so she was the one who gave me Larry's boots and hat out of his wardrobe on the Dallas set.
"She and I had a little bit of saucy fun! In fact, I stripped down in front of Linda Gray - she was like, 'Oh you're taking your clothes off here, oh dear God I'm going to turn around!'
"The two new girls Julie Gonzalo and Jordana Brewster - I took them on a rifle range to see if they could shoot like every Texan says they can! I found out I'm actually really good with a gun. I hit every clay pigeon that was fired, but to be honest the girls did really well for themselves too.
"It was fun things like that - with Jesse Metcalfe, we went on a horseback ride through the Plains and I took Josh Henderson to one of the biggest gay clubs in Dallas and taught him how to line dance!"
How was his dancing?
"His dancing was really good and then I surprised him with something I knew he would like afterwards."
As a Dallas fan yourself what were some of your favourite moments from the old show and who were your favourite characters?
"Well everybody knows the most iconic moments in Dallas - there are a couple of them really but it's 'Who shot JR?' Larry Hagman told me the story about how that season had finished and they'd shot him. He came to the UK because he heard how popular the show was - they were actually talking about not bringing him back.
"He went over to the UK, did all the publicity and sent it all back over to the States. They saw how popular he was becoming and then he renegotiated for upwards to $100,000 per episode!
"What else was there? There was the famous shower sequence where [the deceased] Bobby Ewing reappeared and Pamela had been dreaming for that length of time. I think my favourite characters were Bobby and Pam. I wrote a fan letter - the only fan letter I've written in my life. I wrote it to Victoria Principal [who played Pam] - it was before the internet so you couldn't rewind the show to see where to send it. So I just wrote 'Pamela Ewing, Southfork, Dallas'."
The letter made it all the way to her?
"It did - she wrote me a letter back! She sent me a picture back and a note and signed the picture. Then... who knew this was going to happen? Later on, I was in America and I'd been cast in a TV show by Aaron Spelling called Titans.
"I'm sat in Aaron Spelling's office and he goes, 'John, I'd like you to meet your mother - welcome Victoria Principal' - I almost s**t myself and I was on the phone to my mum saying, 'Oh my God, Pamela Ewing's my mum!'
"It's just weird how things go and how things happen. I have a couple of cars and one of the classic cars I have is the same kind of car that Bobby and Pam drove in the first episode of Dallas - it's a Mercedes SL320 convertible and I love that car because of that show. I'm pretty much a fan geek."
Have you seen any of the new Dallas yet?
"Yes - actually on the first episode of John Barrowman's Dallas you actually see me watching it for the first time and I get so excited I dance on the chair! The moment that sweeping shot of Southfork appears and then the theme music... it's amazing!
"I've seen the first episode; I've dipped into a few other episodes when I've been in America the last couple of months here and there doing other work. I can tell you it's very popular over there and it's already been signed for a second season."
So you're a big fan of the new series as well as the old show?
"Yeah, it's really a good show. It's sexy, it's dangerous, it's edgy, it's fun and it's glamorous. You're going to get everything you want to see in a TV show."
Do you think we could ever see you on Dallas in an acting role?
"Oh my God, the only way that happens is if they contact me and say audition for it, or they want to offer it to me. So that's the only way that's going to happen. I'm not going to actively go to the Dallas producers and go 'I want to be on the show!' - I'm ambitious but not that ambitious!"
But if they approached you, you would definitely say yes?
"God yeah, of course I would. I've always said in my career and in my life I only do things I'm interested in. But if Dallas came to me and said they wanted to offer me a part, I'd be like 'F**k yeah!'"
"I've been asked to be on quite a few US TV shows in the last year but I've not been able to do any of them because of my schedule. I've been up for a couple of other roles - if they come along and ask me to audition, I will, but I'm not actively hunting them down.
"Torchwood is on hold at the moment because of Russell [T Davies] and his partner - Russell is not able to write it. That's not to say it's not coming back, who's to say what will happen to it in the future? Torchwood is very popular so I would personally love it to come back.
"It will probably come back again but under another guise - it might come back as another mini-series or another full series or a movie even, so who knows? What I do know is that me and my sister have written our first Torchwood novel with Russell's blessing - it's called Exodus Code and it's out in October."
So you're still very keen to stay in that Torchwood world in some form or another?
"Well, why wouldn't I? It's a character that I love and it's a show that I love. I'm not a suit who doesn't get into this world - I go around to all the conventions and there's a huge audience out there for it and they want more."
John Barrowman's Dallas airs tomorrow night (Wednesday, August 29) at 10pm on Channel 5