This time, there’s no wedding. No bachelor party. What could go wrong, right? But when the Wolfpack hits the road, all bets are off. “The Hangover Part III” reunites Bradley Cooper, Ed Helms, Zach Galifianakis and Justin Bartha as Phil, Stu, Alan and Doug. Also returning to the ensemble are Ken Jeong as Mr. Chow, Heather Graham as Jade, and Jeffrey Tambor as Alan’s father, Sid. Joining the starring cast is John Goodman.