Torchwood star John Barrowman has revealed that he still fully expects to return to Doctor Who at some point.

Speaking to Ipswich Star to promote his first full UK tour in four years, Barrowman commented: “The popularity of Captain Jack has not decreased around the world, it’s actually gotten stronger and we’re doing some audio plays that are coming out a little later this year.”

Last month marked 10 years since the Glasgow-born actor made his Doctor Who debut in Steven Moffat’s ‘The Empty Child’.

Discussing the continued appeal of Captain Jack Harkness, he said: “I have to be honest, one person who’s keeping Captain Jack alive is John Barrowman because I’m plugging him, promoting him and making sure he’s kept out there…”

He added: “…because one day he will return. I think [the writers] would be very silly not to bring him back.”

> Here are 5 reasons why we think Captain Jack needs to return.

Barrowman also hinted at how Jack would react to Peter Capaldi’s Doctor: “I think [Jack] would look at [the Doctor] and say ‘oh, you’re older than me now’.”

Doctor Who showrunner Steven Moffat revealed last year that the possibility of River Song and Captain Jack Harkness returning is “never, ever closed off”.

The writer stated: “Both River Song and Jack Harkness are massive characters in Doctor Who mythology. Their returns would have to be seismic…”

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Season 9 has been filming in Cardiff since January and will begin on BBC One in September.

> Here’s everything we know about Season 9 so far.

Do you think Captain Jack should return? Let us know below…