Leverage, Season 4

Chesney:
This is my only chance. I've planned for months. I have eight backup contingencies. I'm fighting for my life, Mr. Ford! What are you fighting for?

Nate:
I am fighting for that 15-year-old boy that you're going to kill.

Chesney:
[Scoffs] God helps those who help themselves.

Nate:
And I help people who can't. And God help you if anything should happen to that boy, because if he spends more than one second longer in that hospital than he needs to, I will make it my mission in life to end you. I will ruin you. I will ruin your name. I will ruin your company. I will bring down everything you have ever touched. And when I am done, I will hunt you down, and I will kill you myself.