John Barrowman has revealed why he thinks Captain Jack has proved to be such a hit with Doctor Who and Torchwood fans.

The actor, who was speaking to Metro to promote his new autobiography, I Am What I Am, which was released yesterday, was first introduced as the character in the main show back in 2005, and since then he has appeared in 10 Doctor Who episodes to date, as well as every episode of its spin off, Torchwood.

And Barrowman thinks that part of Jack’s success is down to the fact that the audience find it easy to relate to him and his ‘happy-go-lucky’ attitude towards life.

“I think it’s the fact I’m portraying somebody people can identify with,” he told the newspaper. ”Whether it’s because he’s omni-sexual or he’s proud of who he is - he doesn’t [care] about what anybody thinks.”

He continued: “If I had a formula, I would sell it! I’d be handing it out on street corners for £1.50 each. I have been absolutely overwhelmed by the popularity and success of Captain Jack.”

When asked about Jack’s rumoured return in David Tennant’s last episodes, due to air at Christmas, Barrowman remained tight-lipped, refusing to confirm the speculation despite the fact he was pictured on location filming for the episodes over the summer!

“I’ll put it this way,” he teased. ”Captain Jack will always return to the side of the Doctor when he needs assistance.” And we wouldn’t have it any other way!

admin John Barrowman, TBA & The End of Time, Torchwood