The Lodger - by Gareth Roberts
There's a house on Aickman road, and a staircase that people go up, but never down, as the time-travelling drama continues.
To solve the mystery of the man upstairs, the Doctor faces his greatest challenge yet - he must pass himself off as a perfectly normal human being, and share a flat with Craig Owens.
Doctor Who: The Lodger will broadcast on Saturday 12th June at 6:45pm on BBC One and BBC HD. Please note that the timeslot is subject to change.