“Jack & River Returns Would Have to be Seismic” – Moffat

Steven Moffat has said that he hasn’t ruled out River Song (Alex Kingston) or Captain Jack Harkness (John Barrowman) returning to Doctor Who but there needs to be a”seismic” story for it to happen.

Speaking to Zap2it

Moffat explained: “It’s never, ever closed off. It’s all about ‘Do you have a story that’s worth it?’ Unless you’ve got a story that is absolutely informed and invigorated by their presence, just bringing a character back in an ordinary story won’t do.”

“Both River Song and Jack Harkness are massive characters in ‘Doctor Who’ mythology. Their returns would have to be seismic, not routine.”

He adds: “One of the things you always want to say is ‘leave them wanting more.'”