Just what has happened to Robson Green? Once Britain's housewives' choice, his latest role seems him transformed into a werewolf in Being Human.

Over the last two decades, in Soldier Soldier, Reckless, Touching Evil, Grafters, Northern Lights and Wire In The Blood, it seemed as if the Geordie star was never off the box. In 1995, he became a reluctant pop star when he and co-star Jerome Flynn sang Unchained Melody in an episode of Soldier Soldier. A then unknown, Simon Cowell snapped them up and the song went to No.1 for seven weeks. They had two further chart-topping singles and albums.

For the last couple of years, Robson, 46, has given dramatic roles a wide berth, presenting offbeat TV shows such as Extreme Fishing and Wild Swimming Adventure. But playing werewolf McNair in Being Human, involving five hours in make-up to transform his looks, turned out to be one of the best acting experiences he's ever had.

He said: "Well, hand on heart, in the 26 years I've been an actor, I can count on one hand in terms of really enjoying the experiences and Being Human was one of them. It was so different and so unexpected. It was just more for myself rather than the audience if that makes sense. You know I was really stepping outside of my comfort zone in many ways and I think it has paid off. I used to always do mainstream drama - 'Oh, he's the detective in this, the romantic lead in this'. It was very formulaic drama. I'm going to go left-field a bit in the next couple of years."

Despite taking on fewer roles recently, Robson has been far from idle, running his company Coastal Productions which he set up in 1997.

He said: "I've done 10 years of getting the company off the ground, selling programmes around the world, pitching and getting the finance. Other people are going to do that now and I'm just enjoying acting."

His son Taylor, with second wife model Vanya Seger, is also enjoying it.

Robson said: "He's 10 and loves all this. Playing a clinical psychologist, putting villains behind bars and saving people from imminent death - that's rubbish. But this is fab."

Robson, of Hexham, Northumberland, is one of a number of guest stars - who include EastEnders' Lacey Turner - appearing in series three of Being Human. In the cult supernatural show, Robson's character is abducted by four vampires and has to fight for his life in the cage of a werewolf. He wins but is scarred by the werewolf and becomes one himself. He is seen 16 years later with a son, Tom (Michael Socha), hunting vampires and, in particular, their leader Herrick (Jason Watkins) who turned McNair into a werewolf.

Robson is thrilled with his first taste of the supernatural.

He said: "The one thing I had said to my agent was, 'Get me something offbeat, unusual, something that is against the tide in what people see me in usually'. I was on the set of Joe Maddison's War with Derek Jacobi when the phone rang and Michael said, 'How do you feel about playing a werewolf?'. I said no at first, but then he told me it was for Being Human and I said, 'I'll do it. I'll do it tomorrow.'

"Derek said, 'A werewolf in Being Human, that's a masterstroke. You'd be marvellous. Will one be donning fangs?' It was just fabulous and I was so excited. It was an absolute thrill and it's one of those few jobs where money wasn't important. It was just to improve as an actor, just to have the chance to develop and take on an exciting challenge."

Robson is no stranger to the show. A friend of his, Declan O'Dwyer, directed the pilot. And the actor revealed that within the business, Being Human is greatly respected, especially for its make-up. Like his character, Robson didn't shy away from being transformed into a wolf.

He said: "You can't really bottle out of it. You can't be embarrassed about anything or hold back on it. It's cathartic and wonderful to do."

But the part demanded more than just make-up for the transformation. So Robson had to get toned for the role with the help of a personal trainer.

He said: "I'm no stranger to the sweet trolley and I'm not in the shape I used to be. I always find as an actor that you've got to step way outside your comfort zone in terms of performing - not only on a psychological level, but on a physical level." Robson first became a familiar face on TV as cheeky hospital porter Jimmy Powell in Casualty. His career really took off when he landed the role of Fusilier Dave Tucker in the drama series Soldier Soldier, which also turned him into a pop star. But after two decades at the top of 'I was really stepping comfort zone. I think British TV, seemingly never off our screens, Wire In The Blood was axed in 2008 and it seemed Robson's star was maybe on the wane, especially when he returned to screens splashing around the country in Wild Swimming Adventure. But Being Human shows he is not the sometimes po-faced, rather serious actor many of his characters convey.

His mainstream return will be later this year when he plays a new character in Waterloo Road. Robson's character, Rob Scotcher, is the new love interest of head teacher Karen Fisher, played by Amanda Burton. And he has kept on the personal trainer he took on last year to get in shape for Being Human to make sure he looks enough of a hunk for his love scenes in the school drama. The rest of series six of Waterloo Road, first transmitted last year, will be back next month, with the seventh series, starring Robson, starting later in the year.

But, despite his revitalised acting career, the keen fisherman has not hung up his rod and is planning another seafaring adventure "this time to the ends of the earth".

He said: "I've been around the globe, now I'm going top to bottom - to Siberia, then up to the edge of the North Pole, then down to the south. I'm going to Essential Island, South America, Argentina - it's an amazing experience."

(DAILYRECORD.CO.UK- Rick Fulton)