Steven Moffat has speculated about the Doctor’s life on Gallifrey prior to Doctor Who‘s first episode.

Moffat commented in the new issue of Doctor Who Magazine: “…the Doctor was married (or whatever is the Time Lord equivalent) on Gallifrey. Not just married, but married a long time. He didn’t just have children, he had grandchildren. He had a whole life.”

He pondered: “There’s so much we don’t know, and never will. What happened, that black day… what or who launched the Doctor on his never-ending journey?”

Moffat also discussed whether or not the Doctor is a bigamist in the magazine’s new issue.

What do you think originally drove the Doctor to leave Gallifrey with Susan? Let us know below…