Syd and Vaughn are to pose as the Tabakovs to infiltrate the Contingent, identify their mission and retrieve the EMP. Marshall gives Syd a wristwatch that can send their GPS coordinates and is capable of short burst transmissions. Sloane, meanwhile, tells Jack to contact Alexi Vaselyvich.

In Moscow, Karylko gives Syd and Vaughn new identities -- they are to be known as David and Karen Parker - and takes them to Liberty Village. Marshall tracks their journey to Training Sector 56B, a former Russian military base that now resembles a suburban American neighborhood. Syd and Vaughn arrive at the neighborhood. They are taken to their new home and introduced to the neighborhood.

Karylko, going under the name Tom, says Syd and Vaughn will be tested to see if they can portray Americans convincingly. Marshals picks up Syd's transmission and identifies the "neighbors" as assorted terrorists. Sloane wonders why the Contingent is dealing with terrorists and why they're in a government training ground.

Ironically, Tom tells Syd and Vaughn that they seem a little cold. He gives them a gun. While Syd goes jogging, Vaughn practices assembling the gun. Syd runs into Tom, who tells her that the neighborhood is heavily guarded.

Jack meets Alexi and asks if the Russians still run the old base. Alexi bargains with Jack, expecting something in return for extracting Syd.

Tom gives Syd and Vaughn wedding rings so they look more like a couple. He takes them to a car dealership, their mission is to buy a convertible. The dealer sees the ring, asks how he popped the question. Vaughn spins a tale that moves Syd. The dealer says another couple is also interested in the car. The winning couple gets to move on in the program, he says. The losing couple dies. He gives them a gun to assemble, both couples race to assemble it.

Jack opens a book from Irina's collection of 1st editions. The NSA had cracked the orders the KGB encoded in the books. He tells Marshall that the NSA missed something and puts him to work on it.

The couples shoot it out in the car dealership. In the melee, Vaughn loses the gun. Syd picks it up and kills the woman. She then jumps in the car and runs down the man. Later, Syd notices that the watch is broken. She and Vaughn kiss in the shower.

Marshall finds the code in the ink of a period within an ellipsis. After magnifying it, he sees that it contains a protocol related to one of Irinas operatives, codename Sentinel. Jack says Sentinel is a dead end, a deceased agent. Jack gives the book to Alexi, who says he hasn't heard from Irina a long time. He also says he has an aircraft waiting to extract Syd and Vaughn.

Tom prepares to send Syd and Vaughn Chicago, where they are to gain access to the servers of Pierce Financial. Tom's plan is for a "redistribution of wealth" after an attack on the U.S.

Marshall receives word that the Germans have moved the Tabakovs to a maximum security prison - and assumes the Russians have been informed also.

Tom shows Syd how to use the EMP. He then receives a call from his wife. Knowing her cover is blown, Syd knocks him over the head with a vase and they fight. In another room, Vaughn battles another thug. Syd and Vaughn escape outside where a helicopter has them pinned. Syd triggers the EMP and the chopper falls from the sky.

Afterward, Sloane thanks Syd and Vaughn. He says Russian authorities deny an American training ground ever existed in their borders but off the record they've expressed gratitude for APO's assistance in taking down the October Contingent. Privately, Jack says his suspicions regarding Sentinel are accurate, and the Russians are searching for Irina Derevko. Sloane says they'll have to move up their timetable. Syd and Vaughn canoodle on the plane home.