Once you’ve had Jack, apparently, you can’t go back. Lord Moffat of Who hopes that one day everyone’s favourite immortal poly-sexual Time Agent Captain Jack Harkness (John Horatio Barrowman) will step back on board the TARDIS.
Speaking to The Gothamist Moffat refused to rule out bringing Jack or any other character back from the Russell T. Davies era (there’s still a chance, Thomas Kincade Brannigan!), denying that there was a ‘schism’ between the two eras (is there anyone who actually believes there is?)
It was Moffat himself who wrote Captain Jack’s first appearance in the two parter The Empty Child/The Doctor Dances and there is no reason why he wouldn’t want Jack to come back, no more, no more, no more, no more:
“In my head there is a continuing story. There’s no idea that we’re abandoning anything. There is an element that the Doctor moves on from people in a rather scary but inevitable way. He won’t be nearby forever…”
Well no…he’s dead…right?