The BBC Media Centre have issued the synopsis for the eleventh episode of the current series of Doctor Who:
HEAVEN SENT - by Steven Moffat
Trapped in a world unlike any other he has seen, the Doctor faces the greatest challenge of his many lives. One final test. And he must face it alone. Pursued by the fearsome creature known only as the Veil, he must attempt the impossible. If he makes it through, Gallifrey is waiting…
Doctor Who: Heaven Sent will broadcast on Saturday 28th November at 8:05pm on BBC One and BBC One HD.