Wilf and The Doctor in “The End of Time”

[offering his revolver] Listen, I... I want you to have this. I've kept it all this time, and I thought...

No.

No, but i-if you take it, you could--

No.

You had that gun in the mansion. You could have shot the Master there and then.

Too scared, I suppose.

I'd be proud.

Of what?

If you were my dad. [smiles]

Oh, come on, don't start. But you said... you were told "he will knock four times and then you die". Well, that's him, isn't it? The Master. That noise in his head. The Master is gonna kill you.

Yeah.

[offering the gun again] Then kill him first.

And that's how the Master started. It's not like I'm an innocent. I've taken lives. I got worse, I got clever. Manipulated people into taking their own. Sometimes, I think a Time Lord lives too long...