DOCTOR: Peri, did you see that man who just brushed past us?

PERI: Not really. Was he someone important?

DOCTOR: In a way, I suppose, yes. I don’t want to alarm you, but I suspect... in fact I’m fairly certain... that he had a knife.

PERI: A knife?

DOCTOR: A knife. Yes, Peri. And he just stabbed me in the chest.

(The Doctor collapses.)

PERI: Doctor! Help! Please, will someone get help?