Torchwood, Series 4: Miracle Day

Vera:
The metal missed the spine, but the pericardium was lacerated and a coronary artery was crushed and thrombosed. That's the one in your leg. I had to transplant a section of vein from your thigh.

Rex:
But how did I survive?

Vera:
I don't know. But even when your heart stopped beating, the process continued. The process of life, the viability of the flesh, the transfer of oxygen. It just didn't stop.

Rex:
But do I get better? Do I heal? Or do I just hurt for the rest of my life? Because if this thing keeps going, the rest of my life is forever, right?

Vera:
Rex, now listen to me. Because you might want to take something under consideration. That maybe you were lucky. You should've died last night, but when this thing happened, the miracle, it gave me time to fix you. Without the miracle, you'd be dead.

Rex:
It's like someone cast a spell over the whole world. But what happens when it stops, huh? What happens to me then? Do I die?