Peter, 56, who played the Timelord in the 1980s, will pull on his famous trenchcoat once again for a Children In Need special.
Bosses are tight-lipped about the storyline, written by Who scribe Stephen Moffat.
But an insider revealed: “The Doctor is forever travelling though time so there’s no reason why he couldn't catch up with a former incarnation.
“Peter was top of the writer’s list to make a comeback."
This year’s Children In Need charity telethon takes place on BBC1 on Friday, November 16.