A doctor is found murdered on a golf course, and the team thinks the killer’s in a hospital. Meanwhile, LaRoche takes over CBI and names Cho as the team leader.

After weeks of working the Vincent Adler case with little to show for it, the team finally gets a break when Sara uncovers what Adler has been hunting. Meanwhile, Neal gets closer to finding out the truth about Kate’s death.

Anna is about to pull the switch on the planet’s first Blue Energy reactor, but Sid realizes that the size of the reactor is much too large for just the various Concordia sites – the Fifth Column needs to figure out what Anna is really up to. And Diana tells Lisa she must act against Anna now, fulfill her destiny and save humans from annihilation.

Locked in a battle with a Drone Command Ship, the Destiny is surprised by the arrival of the Aliens that abducted Rush and Chloe.

Julia Child and Julie Powell – both of whom wrote memoirs – find their lives intertwined. Though separated by time and space, both women are at loose ends… until they discover that with the right combination of passion, fearlessness and butter, anything is possible.

Claire is run ragged trying to fix Haley and Alex’s relationship. Gloria is horrified by Jay’s plans to purchase themselves side-by-side crypts. Cameron decides he wants to write a book that celebrates the fact that Lily is adopted, but soon learns something new.

Frankie once again goes head to head with Brick’s third grade teacher, Ms. Rinsky, when Brick gets a D on his math test and Frankie thinks poor teaching skills are to blame. But Frankie wonders whether or not she can make the grade when Ms. Rinsky requires that she and Mike attend a class to test their own math skills. Meanwhile, while begrudgingly watching over their crusty, old aunts, Axl and Sue mull over a plan to accompany Aunt Edie on a search for a time capsule she buried when she was young.

Peter and Neal must assume each others’ identities to uncover a collusion scheme that is causing blackouts in New York.

Erica, now officially in charge of the global Fifth Column, leads them in a high risk attack against Anna. Anna meanwhile, growing closer in her plan to destroy humanity, finds a major obstacle in a certain Live Aboard candidate; and Ryan sneaks back onto the Mothership to try and rescue his daughter.

With time running out, Castle and Beckett must put aside their differences with Agent Fallon to avert a city-wide catastrophe.