If you find yourself wandering around Williamsburg on Sunday, you’d be forgiven for thinking that the zombie apocalypse is upon us. This weekend marks the return of the NYC Zombie Crawl, now in its fourth undead incarnation. Show up to the Knitting Factory at 4pm to get properly zombified (through makeup and cheap drink specials); at six, the slow-moving march begins down Bedford Avenue. This year, the moaning will be accompanied by a film crew – they’ll be shooting a scene for Punk Rock Holocaust 3. As is an annual tradition, the crawl will come to a halt at McCarren Park for a human tug-of-war courtesy of the Disgraceland Hook Squad; zombies who last the whole way will be rewarded with an afterparty at Public Assembly.