Who's Amy Pascal? Who's Scott Rudin? Why are they fighting over Angelina Jolie and David Fincher? Your cheat sheet for the powerful Hollywood moguls and creatives at the heart of the dramatic Sony hack.

Japanese electronics and entertainment giant Sony was hacked last month. What does that really mean? Is it as bad as freaked out people on CNN say? Who did it? North Korea!? Why? Here's everything you need to know.