The Wolf Pack is back, but this time there are no weddings or bachelors parties...and all bets are off. 

Warner Bros. has unleashed the first trailer for "The Hangover Part III," which is promised to be the last of Todd Phillips' comedies starring Zach Galifianakis, recent Oscar nominee Bradley Cooper and "The Office" star Ed Helms as three pals who just can't stop getting into trouble. This time it seems like they're planning some sort of revenge-heist, but have to be on the look out for a beefy criminal kingpin (John Goodman) and their old frenemy Leslie Chow (Ken Jeong).

Judging from this early look, it appears that Phillips and his cast have finally broken out of the proven formula (bachelor party + drug induced blackout = $$$$), but there are still plenty of familiar gags and scenarios for franchise fans. This one will also feature some action in Tijuana, as well as revisiting some old memories in Vegas. 

"Part III" reunites series vets Jeffrey Tambor, Justin Bartha, Sasha Barrese, Gillian Vigman, Jamie Chung, Mike Epps and the lovely Heather Graham. "Bridesmaids" star Melissa McCarthy is also along for the final ride.

"The Hangover Part III" opens May 24.