Edward Kerr

Margo (guest star Julie Warner), a young housewife on fertility medication, is brought to Princeton Plainsboro Hospital when her inexplicable muscle flailing causes her to crash her car. As Margo’s symptoms progress, House and the team think she might have Huntington’s disease but when Margo descends into paranoia, they must dig deeper to figure out the cause of her illness - and the team is once again reminded that everybody lies.

Carrie, Miranda and Samantha are fish out of water in youth-obsessed, no-smoking-anywhere L.A. Meanwhile, Samantha meets a handsome dildo model, while Miranda is mired in her New York ways. Back east, bedroom matters only get worse for Charlotte and Trey.

Bravo Team desperately works to save Sonny from a life-threatening situation, after he becomes trapped in a submarine torpedo tube during a clandestine mission off the coast of North Korea.

Jenna's extravagant birthday party seems to be too good to be true and Aria, Emily, Hanna and Spencer think something else might be up - especially when it turns out that Garrett is getting a pass out of jail to visit his ailing mother on the same night. The timing can't just be a coincidence; the Liars are convinced it all has to do something with "A." With Emily getting an insiders' view working the party, Aria working the crowd as a party-goer and Spencer staked out at the hospital, what could go wrong? The answer is - everything. Meanwhile, Hanna's wallowing through heartbreak leads her to a shocking discovery.

After getting a major clue from Garrett, Hanna and Spencer set out on their separate missions. Hanna sees a perfect opportunity to catch "A" or to at least see who is helping Garrett out. But her perfect plan starts to quickly unravel, leaving Hanna frustrated and desperate. Spencer tries to figure out the meaning of the clue and enlists Jason's help in the search. Meanwhile, Emily gets another flashback from "that night" which leads her to a surprising suspect and Aria starts to question Ezra's sudden influx of cash.