SFX magazine have confirmed the title for the fourth episode of the forthcoming series of Doctor Who as (highlight gap below to reveal spoiler):
The Doctor's Wife
Doctor Who producer Marcus Wilson has commented this:
“It’s an episode that involves quite a big sprawl, huge alien world locations and a new take on a familiar character, which required a lot of work. It’s a big episode, but I think it’ll be one the fans will love. It’s a real love letter to the fans.”
The episode is written by Neil Gaiman and will air in May on BBC One and BBC One HD.