Defying the wishes of her father, Jack (Victor Garber), Sydney (Jennifer Garner) insists upon pumping her KGB-agent mother, Irina (Lena Olin), for information necessary to topple SD-6 -- and, incidentally, to allow Syd to quit the spy game for good. On other fronts, a rattled Sloane (Ron Rifkin), convinced that he has seen his wife (whom he was ordered to kill) alive and well, sends Dixon (Carl Lumbly) to investigate; the Rambaldi music box containing the vital numerical equation is now secreted at Sark's (David Anders) Falkland Islands retreat; a clue to the location of "The Bible" containing information on Irina's former cartel has been traced to a Moscow military library, which Sydney must infiltrate; and Will's ongoing exposé of SD-6 is aided by drug-addled conspiracy theorist Rebecca Martinez (Marisol Nichols). And topping things off, Vaughn (Michael Vartan) comes face to face with his father's murderer. ~ Hal Erickson, Rovi