Section D is forced to welcome an FSB officer onto the Grid to help track down Aibek, a rogue nationalist from the ex-Soviet state of Azakstan. Aibek is in the UK to find the last known sample of the nerve agent 'Paroxocybin'. The chase is on, but will the team find a way to stop the nerve agent falling into the wrong hands without ruining Anglo-Russian relations? Meanwhile, Lucas's personal life takes a passionate turn.
An escalating gang war spills into the stands of a high-school football game, killing several people; an unlikely partnership arises.
The administration unveils a tough new strategy to force Sophia to reveal the detainees' plan; Vicky and Carter possess a crucial hostage.
Cathy and Sean hit the open road to visit their dad. During the trip, Cathy tells Sean she has cancer. Sean falls apart at the news, so Cathy pretends it was a big joke. Adam gets drunk while under the supervision of Paul. Marlene finds Adam on the front lawn puking. Marlene will keep it a secret, but Adam is in further servitude to her.
It’s Sunday and Becky and Steve are bored. Their fridge is broken and Becky’s parents are coming round to fix it. Steve has never met them before and he’s terrified. When they arrive, he’s over-friendly and, frankly, a bit odd. Matters are only made worse by Dan, who’s audibly enjoying himself upstairs with his new girlfriend, Paris. At least he says she’s his girlfriend.
Gossip spreads fast when Kim reveals her lesbian affair in the tabloids, and NeNe rekindles her roller coaster relationship with Kim just in time to get the inside scoop. NeNe’s got drama of her own -- her marriage is on the rocks and her old friend Dwight has been spreading rumors behind her back. Shereé pursues her long-time dream of becoming an actress and Kandi starts getting back into the dating scene. NeNe, Kim and Sheree hit up a couture shoe event and run into new housewife Phaedra Parks – the pregnant, classy, but sassy attorney-to-the-stars, who arrives with her old pal Dwight.
Silver plans a cancer-awareness charity event to honor her mother and enlists the help of Navid, Dixon, Liam and Teddy to appear in a bachelor auction. Ian, a theater student at West Bev, is brought in to help choreograph a dance number for the auction, but all comes to a stand-still when Teddy directs some negative words toward him. Annie and Adrianna discover the truth about Naomi and Mr. Cannon. Annie discovers Debbie’s financial problems and decides to take an offer to make some quick cash. Ivy and Dixon decide to spend the night together, but Dixon hits the brakes when Sasha returns with some life-altering news.
Mike dives into an amazing Michigan collection but Frank seems to have lost his picking mojo. The guys visit an incredible Wisconsin property that features a reconstituted vintage town. And, the only thing better than Ted’s quirky small town gas station is his one-of-a-kind home where everything is for sale. Frank senses engine trouble with the van while Mike ignores the signs and ends up on his hands and knees.
When a coded document attracts Castle's attention, Beckett must steer the case back to the violent felons who populated their victim's world; when Beckett's ex-partner arrives, Castle must watch the relationship become romantic.
Sterling Cooper Draper Price employees resort to scuttlebutt after an agency wide meeting is called.
The CSI's must catch a madman causing havoc all over Miami and the team has to mourn one of their own.
As Mason goes in for his 6-month check-up, Kourtney realizes she wants another baby so her kids will be close in age like she and Kim were, but when she obsesses about getting pregnant, Scott thinks she's taking all the fun out of the process of trying. Meanwhile, Bruce has a hard time accepting that 12-year-old Kylie has male friends, and there's tension when she breaks the rule about inviting a boy up to her room.
Matthew Crawley and his mother Isobel arrive at Downton, and have difficulty settling in. Carson is mortified when confronted by his past. Violet attempts to promote a match between Matthew and Mary. Isobel is elected to serve on the hospital board.
Grampa gives each family member a portion of his savings; Lisa worries that Nelson's instant success with a new business venture might lure him away from continuing his education.
Lynette is angry when Renee starts spending a lot of time with Tom; Bree finds herself falling for Keith (Brian Austin Green); Susan feels guilty about her side job.
Stan offers a reward to the person who can stop Hayley and her old boyfriend from eloping.
Dexter tries to focus on the children and fight his dark urges; Debra ends up on Quinn's doorstep.