We Are Legion tells the story of hacking from its earliest days (everyone tries to forget this now, but Steve Jobs started out as a hacker) through its more recent, populist formulations. Everything you need to know about 4chan, Anonymous, and LulzSecfrom the internet-organized real-life protests of Scientology centers worldwide through WikiLeaks and the Arab Springis told in a zippy, highly visual style. Important questions of privilege, race, and sexism are never really addressed, but this is still required viewing. (SIFF Film Center, Seattle Center, www.siff.net, 6 and 8 pm, $10)
Documentaries dont get much more lively or timely than this.