Haley gets back together with Dylan. Alex and Sanjay plan their breakup since they are both going off to college. Mitchell avoids finding a new job and takes up art. Jay and Gloria try to find a good preschool for Joe.

Brian Finch’s life takes an extraordinary turn when he uses a mysterious drug, NZT, that allows him to access his full brain capacity. However, when an NZT-related murder lands Brian on the FBI’s radar, he uses the drug in an attempt to stay ahead of the authorities long enough to clear his name.

After passing the Captain’s exam last season, Beckett was surprised with an offer to run for State Senate. In the action packed season premiere, Castle and Beckett are adjusting to Beckett’s career change, when a call from a mysterious stranger sets off an explosive chain of events. There are two sides to every story, and this unique two-parter will explore the same story from each of their perspectives, first from Castle’s side as he searches for Beckett.

Alec joins Carlos and the VPD; Kiera and Garza form an alliance.

Kellog uses Alec’s weakness against him; Kiera tries to negotiate; Alec sets out on his own to try to save Emily.

Kiera, injured during her and Brad’s escape from the future soldiers, has a renewed desire to return to her son in the future. Brad reunites with the future soldiers in a bid to gain their trust and work from the inside. Alec gets revenge on Kellog by hacking into Piron which causes unexpected consequences and revelations.

The final standoff brings the Masons, the 2nd Mass and their new allies into the bowels of an iconic American location, wrought with new and unpredictable obstacles. Despite great loss along the way, they must persevere with hopes of once and for all reclaiming Earth and humanity.

With their backs against the wall, Jessica and Louis make a last-ditch effort to rally the support of the partners, as Daniel Hardman and Jack Soloff attempt a takeover of the firm. Meanwhile, Mike and Harvey must each face down the demons of their past in order to make potentially life-altering decisions

Tom gains a powerful new weapon against the Espheni; Ben attempts to extract enemy plans.

Rachel and her mom plan for Rachel’s dream wedding, but Rachel worries that the event could reveal Mike’s secret. Meanwhile, Daniel Hardman and Jack Soloff make their move against Jessica and the partners, Harvey and Mike tangle with Hardman’s mysterious backer and Louis tries to find Jack’s weakness.