Torchwood, Series 4: Miracle Day

Jack:
Time to move on. But not with you.

Angelo:
I'm sorry. I was terrified, Jack. They said you were the devil, but other people said you were a blessing.

Jack:
Something happened to me once, a long way away. Time itself changed me to a fixed point. And now I can't die. I suffer and I perish, but I always come back. I've lived through a lot of Earth's past and a lot of its future. And I'll keep on living this life forever.

Angelo:
In the future, are we together?

Jack:
What does it matter?

Angelo:
Are we together?

Jack:
We can't be, because one day you're gonna die and I won't.

Angelo:
Then we forget the future. We make the moment now. We make a promise and we go forward.

Jack:
Angelo, don't.

Angelo:
What? You're lonely too. You said you want a companion.

Jack:
Don't make me do this.

Angelo:
You're not going without me.

Jack:
Just let me go.

Angelo:
But you can't. I'm never gonna let you go. I could travel this whole wide world, but where would I find another man like you? Please, don't leave me on my own.

Jack:
I'm sorry, Angelo, but this is the story of my life. It always ends the same way - you kill me. [he stands at the edge of the roof] Men like you... You kill me... [he falls backwards off the building and then disappears]