In all their years on BBC sci-fi series Doctor Who, it’s hard to believe that popular characters Captain Jack Harkness (John Barrowman) and River Song (Alex Kingston) have never shared screentime.

“I think it’d be great if she met with Captain Jack Harkness,” Kingston said at Edmonton Expo in Canada. “It’s funny because John and I, we talk about, we imagine, fantasise about all the possibilities.”

And with change afoot in the Whoniverse, Kingston thinks River and Jack’s time is now – even if it is just for a guest storyline.

“Certainly I think that now Chris Chibnall is showrunning, it would kind of be fantastic,” Kingston said.

“Not necessarily a spin-off show, but it kind of would be great if even the Doctor happened upon a bar in the universe where River and Captain Jack happened to be sitting, having a drink or something. I think it’d be cool!

“So, tweet about it,” she concluded, a call to action that we’re sure dedicated Who fans will take on.

However, Kingston said there could be just one snag – exiting series showrunner Steven Moffat, who created River for the Doctor Who role and has been the sole storyteller for her adventures since.

“Obviously Steven is no longer showrunning, but I think Steven is very attached to the character of River,” she said. “I mean he killed her off right at the beginning, but I think it was sort of not easy him to necessarily completely let her go.

“Hence I think the reason why one night in Darillium is 25 years. I mean, we’re not even past breakfast yet.