The actor said: "I haven’t heard anything. There was a rumour online that said I’m not able to do it because of my schedule. But, actually, I haven’t been asked.
"So it’s nothing to do with my schedule. And to be honest with you — I have time. I’ve always said, if they come to me and ask me to do Doctor Who or Torchwood ever again, I would do it at the drop of a hat."
Barrowman talks about his other projects and meeting Princess Anne at Buckingham Palace in the full interview on the TV Choice website.