Sleep No More, which is a "found footage" stand alone episode, airs tonight on BBC and BBC America.
The last 3 episodes are supposed to be a 3-part finale.
Face the Raven
The Doctor and Clara, with their old friend Rigsy, find themselves in a magical alien world, hidden on a street in the heart of London.
Sheltered within are some of the most fearsome creatures of the universe… and Ashildr (Maisie Williams)! With a death sentence hanging over their heads, not all of the intruders will get out alive.
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 (apparently it's pretty much a 45-minute monologue by Peter).
If you took everything from him, betrayed him, trapped him, and broke both his hearts...how far might the Doctor go?
Returning to Gallifrey, the Doctor faces the Time Lords in a struggle that will take him to the end of time itself. Who is the Hybrid? And what is the Doctor’s confession?
I think that we can guess when Clara dies.