Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

Let me give you an example: At the beginning of the movie Gangs of New York, Priest Vallon tells his son not to wipe the blood of the blade after he's cut himself shaving, saying "The blood stays on the blade". I've watched the movie multiple times, but can never find what the meaning behind that phrase is. Anyone able to shed some light on this?
The answer to this example can be: What's the meaning behind the phrase "The blood stays on the blade"?
Here is why: A person gives a detailed description about a scene from the movie Gangs of New York and asks the meaning of a said phase in the scene. The question is summarized as What's the meaning behind the phrase "The blood stays on the blade"? for easy indexing the next time someone searches for a similar phrase

OK. solve this:
I've been watching season 1 of 24 for the third time, and trying to work out if Nina's behaviour does add up to the season's final plot twist. This question pretty much explains everything: Why did Nina Myers help Jack Bauer if she was a mole? However, in episode 22, while Jack is being held hostage by the Drazens and Chapelle refuses to do anything about it, Nina unexpectedly calls Palmer and asks him to help save Jack. Now, I really see no reason for her doing that! She can just let things happen and continue to do her job, her employer's plans are succeeding and Jack's killing was part of it. Is there any consistent explanation as to why she would go out of her way when she obviously didn't have to?
Answer:
Why does Nina Myers call Palmer in episode 22 to help save Jack from the Drazens?