The Hangover 3 , the concluding part of Todd Phillips ' boozy pill-ogy, probably won't be diverging too much from the formula that's worked thus far. Mike Tyson may not be returning, and there's no wedding this time out, but rest assured, the carnage will continue. And, thanks to these new EW stills, here's some evidence of the fact. Yes, that's everyone's favourite go-to sociopath Mr. Chow ( Ken Jeong ) back to add to the mayhem. "The Hangover Part III is Alan's story,'' director Todd Phillips tells EW of Zach Galifianakis ' Rohypnol-packing mad man. ''He's going through a crisis after the death of his father. The Wolfpack is all he has.'' Phil ( Bradley Cooper ), Doug ( Justin Bartha ) and Stu ( Ed Helms ) all return to help Alan through his grief. "This time, there's no wedding", runs the official synopsis, "no bachelor party. What could go wrong, right? But when the Wolfpack hits th