Captain Jack is putting the finishing touches on his new Torchwood team.

Sources confirm to me exclusively that All My Children starlet (and upcoming Grey’s Anatomy guest star) Alexa Havins has joined the upcoming fourth season of the cult smash as a series regular.

Additionally, Dollhouse beauty Dichen Lachman has signed on to guest star in the premiere.

RELATED: Exclusive: Bill Pullman Joins Torchwood As Regular

Havins will play Esther Katusi, a CIA Watch Analyst who possesses an unshakable faith in human nature and a monster crush on colleague Rex (played by fellow T’wood rookie Mekhi Phifer). Greek‘s Amber Stevens had been circling the role.

Havins can next be seen in the Feb. 10 episode of Grey’s playing the new much younger girlfriend of Mer and Lexie’s father, Thatcher.

RELATED: Exclusive: Mekhi Phifer Set As Torchwood Lead

Details are scare about Lachman’s character, save for that she also works at the CIA.

Also joining series stars John Barrowman and Eva Myles this coming season are Bill Pullman (as the Big Bad) and Crash‘s Arlene Tur (as a surgeon).

RELATED: Crash Star Arlene Tur Boards Torchwood

Season 4 of Torchwood will air stateside on Starz in a co-production deal with BBC Worldwide Prods.