Alexa Havins and Dichen Lachman in Torchwood

Captain Jack Harkness is still working on that international flavor for season four of Torchwood and the new additions should allow the show to become an even bigger hit than it already is.

TV Line has announced that Alexa Havins (All My Children, Grey’s Anatomy) will be joining as a series regular, and Dichen Lachman (Dollhouse) will guest star on the season premiere.

Lachman character will be working for the CIA, but there isn’t much info on the character right now, which could mean a few surprises along the way.

Havins will be Esther Katusi, a CIA Watch Analyst with an unwavering faith in human nature. She also has a crush on Mekhi Phifer, another Torchwood newbie. Havins won’t just be giving off romantic sparks in Torchwood either as she’s set to play a very important person in Thatcher Grey’s life on Grey’s Anatomy.

One new addition to the show that definitely isn’t a member of the CIA is Bill Pullman. You need to check out his killer new role. I can’t wait to see how he gets wrapped up in the action.

Season 4 of Torchwood will air in the US on Starz in a co-production deal with BBC Worldwide Productions.