Okay, so I usually skip filler, but this one with young Kakashi and Itachi was actually so good! Seeing Kakashi struggle with that brutal 'no survivors' mission, and Itachi just being stone-cold, really highlighted how different they were even then. It makes me wonder if Itachi's ability to just *do* things like that was always there, and how much it set him up for everything he'd eventually have to do to his clan.