The guys have one too many 'circles' and think that the FBI are out to get them.

Sydney is forced to seduce an arms dealer in order to obtain a NSA code-breaker. Also, Sydney and Jack fight to tell Nadia about Irina. And Vaughn fears for Weiss' life.

Santos begins to work on his Presidential campaign and sets up headquarters with Josh in New Hampshire. Together, they sort out a myriad of problems from setting up their office to the ideals and goals of the campaign. Meanwhile, Donna and Will work on Vice President Russell's campaign, but Donna has a hard time accepting that Josh is gone.

At the beginning of the episode model AUDREY is out! When the designers selected their models this week, they didn't realize that they were also choosing their next client. The challenge: to design a wedding dress for the model they have selected. Having seen Morgan drive other designers to distraction, Jay wonders if he hasn't made a fatal choice when he realized how pivotal Morgan, his choice in model this week will be in his performance in this challenge. With only two days to work, and $300, the designers are off to work.
A few of the models decide to check in, some with boyfriends, putting all the more pressure on our designers. With picky clients the designers are fighting the clock and in some cases their own better judgment as the runway approaches, everyone steels themselves for a tough runway. Which designer will be left at Project Runway's altar?
You're either in, or you're out, who was out this week? Nora is Out!

After ten years of marriage, Doug finds a new love - in the form of designer cologne that Carrie can't stand, but his scent-ual affair forces Carrie to demonstrate bad behaviors of her own. Meanwhile, Arthur attempts to show Spence and Holly the finer points of movie hopping.

Mac, Aiden and Flack investigate when Elaine Curtis is found dead at a dog competition, a knitting needle sticking out of her chest, and no shortage of suspects ranging from judges to trainers to contestants. Stella and Danny investigate the death of bicycle messenger Michael Starling, but the crime scene may have been anywhere along his route.

When a rap producer is found shot to death in his studio, detectives focus on his protege, whose demos link him and a friend to a second murder. As the investigation unfolds, Southerlyn's opinions put her sharply at odds with both McCoy and Branch.

When Locke learns that Boone wants to share their "secret" with Shannon, Locke decides to teach him a lesson. This leads to Shannon's life being placed in what seems like peril. Boone and Shannon's dark past is revealed in a shocking backstory that recalls their relationship right before the plane crash and presages the return of the beast. Kate, who has become a confidante to the soft-spoken Sun, is puzzled by Sun's mysterious behavior and the revelation that she can speak English. A hungry Hurley must convince Jin to share his fish by making up for offending Jin by rejecting his offer of raw fish early on, or he'll continue to suffer digestive problems from the limited island diet.

TONIGHT: Actor Dennis Quaid! Plus, Lewis' "Back In Black"!