A senior pathologist that Nikki had come to blows with ismurdered and Nikki is prime suspect. The team fight to clearNikki's name, as she suspects someone is trying to frame her.Tony learns of the pathologists death and fears that his sonmay be involved. Nikki is released from custody and grows evermore suspicious of Scott.
In order to save a United States Special Forces unit fromcertain death, Team Scorpion must brave the subzerotemperatures of Antarctica. Also, when Happy becomes cut offfrom the team and lost in a blizzard, Toby risks his life tofind her/
Kensi and Deeks go undercover at a decommissioned nuclear powerplant as the team investigates the radiation poisoning of aGunnery Sergeant moonlighting as a security guard there.
In present day Prague, Martin makes a deal with the Russiansto rescue Kate. Meanwhile, President Arsanov's plan for Kateis moving forward in Chechnya. Gabi struggles to decide what todo about her husband. In 2004, Dmitry asks one last favor ofTerrence. And in a flashback to 1972, the last pieces of thepuzzle to understanding Martin Odum's true identity arerevealed.
In present day Prague, Martin and Nina search for Tamir'sassociate Beslan in hopes of getting answers about theimpending threat on the summit, as well as Kate's location.Meanwhile, two Chechen assassins put their deadly plan intoaction. Malika, Tamir's wife, gives Beslan orders that shethinks will save both of their lives. In 2001 Prague, Ballardconfronts a life-altering injury, and Dmitry struggles tocomplete his mission without breaking his promise to helpIlyana and her daughter.
Arthur is pushed to the limit as he continues to try and winover Morven. Zosia is offered a prestigious position inEdinburgh, but that throws her future with Ollie into doubt.Hanssen sends Dom, Morven and Arthur to a outdoor pursuitcentre to try and win a grant.
JP's brother arrives unannounced, halfway through the secondterm of the year. All of a sudden the residents of HartnellAvenue realise how close they are to finishing their degrees.Howard's plans may be ruined by Candice. Oregon needs help fromRosa to get her USA scholarship. Vod has a money-making schemethat she's been working on. Kingsley is looking for love in allthe wrong places. JP has plans to have one last big blowoutbefore everyone gets on with studying.
Jonah's coworkers discover a mannequin that looks exactly likehim. While trying to prove that the teasing doesn't botherhim, Jonah ends up doing the complete opposite. MeanwhileCheyenne is thinking of putting her baby up for adoption.
With Astra in captivity at the DEO, her husband, Non,captures Hank, leading to a tense standoff between the twosides. Also, Kara continues to refute Cat's allegations thatshe is Supergirl.