In 2004, John Casey is in Chechnya undercover as an energy consultant, staying with his AP photographer girlfriend, Ilsa (Ivana Miličević).

Chuck informs Casey of the flashes, and then teases him with the nickname "Sugar Bear," which he got from Ilsa's file.

Casey is prepared to give up - if Ilsa was the good woman he thought, she wouldn't be with Federov.

Meanwhile, Sarah runs into trouble when the one of the mob enforcers recognizes her from the party, and she is forced to knock him out and hide him.

She later approaches Casey at the Buy More and admits she was never caught in the bomb blast, and works for the French Secret Service assigned to bring down Federov.

Later, Chuck goes to Casey's apartment and finds him heavily drunk, listening to Neil Diamond, and enjoying a dinner of burnt Hot Pockets.

They contact Sarah and arrive at the hotel but are ambushed in Federov's room and tied back-to-back.

Using Chuck to protect his back and also as a weapon, he takes on the henchmen but they are eventually forced out a window and fall several stories into a pool below.

Casey emerges from the pool and has guns drawn on him by several of Federov's men as he announces his objection to the wedding.

Sarah backs him up, but recognizing she is outnumbered, sets her gun down only to kick it to Ilsa, who ends the stalemate by drawing it on Federov.

Casey and Ilsa share one night together and say goodbye outside Chuck's apartment the next morning (while he incompetently tries to spy on them).

They're greeted by Jeff and Lester, but Morgan takes control to help them decide on a joint anniversary gift.

Both insist their choice will give them more time together - Ellie believes they can watch TV together, while Awesome argues they don't have to worry about laundromats and can stay in more.

Unfortunately he didn't realize that the all-male group was playing strip poker, and hurriedly leaves when the others start undressing.

Meanwhile, Sarah is looking for Chuck and arrives at his apartment, where she finds that Ellie is very drunk and upset about the fight.

Although Chuck received a full, 22-episode pickup for the rest of the season, Josh Schwartz elected to end with the episodes already filmed rather than restart production.

Bosnian actress Ivana Miličević was cast in the role of Casey's former girlfriend Ilsa Trinchina, who he believed was killed in a bombing in Chechnya.

Contrary to the subtitles, Sarah does not say "Don't touch me again, pig" in Russian to her assailant in the hotel.

IGN also praised the revelation of Ilsa's identity and the fight scene with Chuck and Casey tied back-to-back.