When the Pod goes to Washington D.C. to consult for a pharmaceutical company, Marty faces a challenge from April to stay monogamous on the road, which puts Jeannie in the position of having to « take one for the team » and fully satisfy a female client; Jeremiah reveals something serious to April, asking for her discretion until he can tell Marty himself; a jealous Monica drops a huge bombshell on Marty.
As the Fringe team investigates a mentally ill patient who appears to be connected to a series of murders, frightening clues and connections are uncovered that lead Olivia to some shocking revelations.
When a charity worker is killed, Jane has Erica Flynn, a murderer he helped imprison, furloughed in exchange for information she claims to have about the case. Meanwhile, Rigsby and Sarah try to adjust to impending parenthood.
Phil and Claire go overboard with drinks, and divulging personal information, on a night out to celebrate the sale of a house to Mitchell and Cameron’s friends.
Frankie pulls out all of the stops in an effort to get an over-excited Sue tickets to a Justin Bieber concert, Mike is thrilled over Brick’s enthusiasm to win the school’s spelling bee and coaches him for the event, and Axl and his friends attempt to break a road sign’s 15-mile-per-hour speed limit – on foot.
Castle and Beckett pursue a ruthless killer who, they discover, is part of a sinister, international conspiracy. Castle and Beckett are joined on the case by Sophia Turner, a smart, sexy CIA operative who has a complicated past with Castle.
Lily and Marshall invite Robin and Kevin on a Valentine’s Day trip to Vermont. Kevin and Robin use the trip to talk about taking their relationship to the next level. Meanwhile, Barney realizes he has finally met his match.
Marty goes to war with his son’s school when Roscoe is accused of sexual harassment for trying to kiss a boy. On the home front, Marty’s personal life is further complicated when April, a stripper he met in New York, suddenly reappears. Meanwhile, Jeannie starts to get cold feet at the prospect of her upcoming wedding.
Peter, Olivia and Walter come face to face with a mysterious and terrifying Fringe event as they get trapped in a town that there’s no escaping from.
While a jury deliberates the guilt or innocence of a defendant on trial for murder, Jane tries to prove she has been wrongfully accused before time runs out. Meanwhile, Summer may have gone too far when she helps Cho make a case against a suspect.