Funny, I once had to write a paper for school as to why we should or why we shouldn't have immortality and I wrote a point similar to this. Here is an excerpt: "If they got life in prison, they would never get out" So that made this even funnier for me. Good work.
I do remember an episode where this guy was out lost on a stormy night (broken down car?) and this weird group of monks took him in. There was this weird howling noise in the castle. He found a dude locked in a cell and let him loose. Turns out it was Satan. Is that the one that you're thinking of?