"True Blood" actor Sam Trammell recently offered hints on what audiences can expect when the hit HBO vampire series returns for Season 3 in June.

Playing shape-shifter Sam Merlotte, Trammell teases that his character becomes adamant about locating his biological family. His search is successful, but he soon learns they are "pretty bad news."

"It's going to lead to some pretty dramatic and interesting stuff for him this year," Trammell said.

In addition, Merlotte's shape-shifter secret will take a blow.

"A lot of people know he's a shape-shifter now, like Andy, Jason and Sookie," he explained. "He's slowly getting revealed and the more he gets revealed, the chains that have been binding him -- as far as trying to keep who he is secret goes -- are slowly breaking."

Another Season 3 highlight is the arrival of werewolves. Will they wreak havoc on Bon Temp?

"I'm not sure -- I did read the books but I'm not exactly sure how the werewolves are going to be put into the show," he said. "I do know the werewolves are disgusting creatures. They're dirty, they're not shape-shifters -- they're disgusting, low-level, smelly creatures. Perfect for Sam!"

"True Blood" stars Anna Paquin, Stephen Moyer, Alexander Skarsgård and Ryan Kwanten.

New cast additions for Season 3 include Brit Morgan, Denis O'Hare, Dawn Olivieri, Theo Alexander, Alfre Woodard, Grant Bowler, J. Smith-Cameron, Lindsay Pulsipher, Cooper Huckabee and Joe Manganiello.