Getty will play Thomas Grace, a new agent on the APO team who brings experience with deep-cover missions for other parts of the CIA.

"Alias" has a history of periodically blowing up its premise -- and did so again at the end of last season -- and adding and subtracting characters. But the three additions since late July -- Rachel Nichols ("The Inside") and French actress Elodie Bouchez are the others -- represent an unusual concentration of new blood.