The Hangover is a movie about an astronaut left for dead by his crew on mars. He uses his knowledge of chemistry, robotics, and physics to overcome the odds. In my opinion this movie was very well written, and acted. It was non-stop action all the way through, and lots of nail-biting events. Two days before his wedding, Doug (Justin Bartha) and three friends (Bradley Cooper, Ed Helms, Zach Galifianakis) drive to Las Vegas for a wild and memorable stag party. In fact, when the three groomsmen wake up the next morning, they can't remember a thing; nor can they find Doug. With little time to spare, the three hazy pals try to re-trace their steps and find Doug so they can get him back to Los Angeles in time to walk down the aisle.
Hangover Part 2 Two years after the disastrous events in Las Vegas, it is now Stu's (Ed Helms) turn to walk down the aisle. Since his bride is from Thailand, Stu decides to hold the wedding there. Desperately hoping to avoid the mayhem of Doug's (Justin Bartha) bachelor party, Stu chooses what he thinks will be a safe option: an alcohol-free, prewedding brunch. But this being Thailand, and with Phil (Bradley Cooper) and Alan (Zach Galifianakis) again in attendance, anything can happen.
Hangover Part 3 It's been two years since the gang known as the Wolfpack narrowly escaped disaster in Bangkok. Now, Phil (Bradley Cooper), Stu (Ed Helms) and Doug (Justin Bartha) have happy lives at home -- but Alan (Zach Galifianakis) doesn't. Still lacking contentment and a sense of purpose, Alan has gone off his meds and surrendered to his natural impulses. It's up to the other members of the Wolfpack to get him through his personal crisis by embarking on a road trip to the place it all began: Las Vegas.