What's the 'harm' in letting her leave early? = I don't see any 'harm' in letting her leave early. = There's no 'harm' in letting her leave early. [=letting her leave early will not hurt anyone or cause a bad result]
I want to be sure that no 'harm' will come to her. = I want to be sure that she won't come to any 'harm'. [=that she won't be hurt in any way]
He claims that he didn't mean any 'harm'. [=that he didn't mean to hurt or bother anyone]
(..) there's only two possible outcomes. Either I make it down there in one piece and I have one hell of a story to tell, or I burn up in the next ten minutes. Either way, whichever way... no harm, no foul! Because either way... it'll be one hell of a ride. I'm ready. Shenzhou, in the blind, this is (..)2013 Gravity