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...
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...
Peter Capaldi , Jenna Coleman , Jami Reid-Quarrell
Rachel Talalay
BBC , Bad Wolf
as The Doctor
as Clara