The Crumbling Magician

The TARDIS has crashed, its passengers in a bad way. The Doctor - not in the best of health anyway, his old body wearing somewhat thin - is in a coma, Ben unconscious. As for Polly, she's been affected worst of all. Time is running in the wrong order for her and she's seen the future, a future in which she's mortally wounded. But will Continuity allow her to die?