Castle and Beckett are motivated to be wed after a murder investigation dispatches Castle into an alternate universe where he's never met Kate, Ryan or Javier.
Beckett has an interview with a federal law enforcement agency which compels her to reassess her job and her relationship with Castle. The latest case involves skid row and turns up many peculiar things about the death of a young woman found inside a water tank there.moreless
Castle and Beckett's unsuccessful meet-the-parents dinner leaves them arguing, even as they must head out to recover a murder witness. A surprise attack leaves them and the witness on the run without a phone or a gun. The two must find a way to keep the witness safe, if they don't kill each other first.moreless
New evidence found online has Moretti seeing Pierce's conspiracy theory in a new light. Pierce's new doctor presses him to face the truth about Natalie. (Part 2 of 2)
When a convicted murderer is released early due to overcrowding and then found mauled by a bear, the list of suspects is long. Walt suspects someone baited the bear to attack so the team sets out to track down the bear and the person who used the bear to commit murder. Branch's uncle is taken into custody when he fires his shotgun in his retirement home.moreless
After a former Navy intelligence officer is murdered, Hetty contacts a former coworker when the NCIS team uncovers a threat to national security.
As Beckett fights for her life, Castle attempts to find the person responsible for the shooting. Meanwhile back at the precinct, Ryan and Esposito try to adapt to the new captain in charge.moreless
A manhunt is launched for professional hitman, Hal Lockwood, after he escapes during a court hearing. Lockwood possesses information about the murder of Beckett's mother. As the hunt proceeds, Castle and the team find there's someone with connections to law enforcement who's linked both to the death of Johanna Beckett and to Lockwood's escape. The season finale leads to a highly emotional and deadly conclusion with the search for Lockwood and his co-conspirator.moreless
Castle and Beckett investigate the murder of the lead detective on Beckett's mother's homicide case.
Castle and Beckett investigate the death of an Irish mobster, but while on the case they uncover what may be an international drug smuggling operation, as well as the killer may be involved in the murder of Beckett's mother.moreless
Bud fights for his life after having his leg blown off by a land mine and being operated upon multiple times. Admiral Chegwidden and Lt. Singer testify before the Senate Intelligence Committee about their roles in the search for Kabir Atef.moreless
Harm and Mac in Afghanistan, Chegwidden and Singer at the Pentagon, and Sturgis on the submarine Watertown are all working to uncover and stop an attack on the Seahawk carrier group.
Bud and Coates investigate a claim that a stray Navy bomb destroyed an Afghanistan school.
Harm and Mac return to the aircraft carrier USS Seahawk ("A New Life" & "Crossing the Line", among others) to brief the JAG officers on the new Rules of Engagement, following the escape of Taliban fighters as a result of a JAG officer's hesitation to determine if the target was legitimate.
While Harm is aboard the ship, the captain asks him to fly a bombing mission into Afghanistan. However, Harm's excitement changes to concern when his plane sustains critical damage from enemy fire.
Meanwhile, a jealous Lt. Singer sabotages Bud's case when she hears of his imminent promotion.
Val and her "staff" are invited to a charity event. The "staff" are to be used as models and parade down the runway. During the fashion show terrorists interrupt and hold them hostage. Val must now locate Simon Wirth as he is the one the terrorists want. She finds him but he refuses to come so she takes him at gunpoint. The terrorists want Simon because he has the codes for the U.S. treasury, or so they think. He hasn't developed a new code for the treasury in over a year. The terrorists decide to open gunfire and a fight ensues leaving V.I.P. the winners.moreless