The Greater Good
Season 6, Ep. 19
An investigation into the murder of a Wall Street trader takes a shocking turn when Castle and Beckett discover Gates' estranged sister is involved.
READ: 'Castle' wedding update: Castle and Beckett tackling their invite list hits close to home
First Aired: March 24, 2014
The Way of the Ninja
Season 6, Ep. 18
When Castle and Beckett investigate the mysterious murder of a Japanese ballet dancer, they end up being targeted by a ninja assassin.
First Aired: March 17, 2014
In the Belly of the Beast
Season 6, Ep. 17
Beckett is asked to assist with a narcotics investigation; when a routine undercover operation goes awry; Beckett faces dangerous men from the New York underworld.
First Aired: March 2, 2014
Season 6, Ep. 16
A guilt-ridden woman confesses to a murder, but contradictory evidence and a second confession complicate the case.
First Aired: February 23, 2014
Smells Like Teen Spirit
Season 6, Ep. 15
Castle and Beckett investigate the case of a high school mean girl who appears to have been killed by someone with telekinetic powers.
First Aired: February 16, 2014
Dressed to Kill
Season 6, Ep. 14
When an employee at a fashion magazine is found dead, Castle and Beckett must dive into the world of high fashion to investigate; Beckett's history in the modeling world earns her access to a wedding surprise.
First Aired: February 9, 2014
Season 6, Ep. 13
When a pop star is found dead in an alley, Beckett and Castle look into her hard-partying lifestyle; a shocking revelation rocks the investigation.
First Aired: January 20, 2014
Season 6, Ep. 12
The murder of a video store clerk with a secret history leads the team to Castle's father (James Brolin).
First Aired: January 13, 2014
Season 6, Ep. 11
Castle and Beckett suspect a serial arsonist of murder; Jenny goes into labor.
First Aired: January 6, 2014
The Good, the Bad & the Baby
Season 6, Ep. 10
A dying man leaves a baby with a priest; Castle and Beckett end up taking care of the baby while they investigate.View Gallery ►
Season 6, Ep. 9
When a woman who looks very similar to Lanie is murdered, the team thinks the killer may be targeting members of the 12th precinct.
First Aired: November 18, 2013
A Murder Is Forever
Season 6, Ep. 8
When a well-known relationship therapist is murdered, it seems that she was targeted due to the secrets she knew about her powerful and elite clients.View Gallery ►
Like Father, Like Daughter
Season 6, Ep. 7
Alexis asks Castle for help proving a death row inmate's innocence 72 hours before his execution, but they uncover a secret that could seal the man's fate.
Read More: Wedding bells ahead: 'Castle' creator weighs in on what's in store for Beckett and Castle
First Aired: November 4, 2013
Get a Clue
Season 6, Ep. 6
Castle and Beckett investigate the bizarre murder of a young woman who was found ritually posed. When the team finds a collection of strange symbols in her apartment and the prime suspect turns out to be a mysterious monk, Castle becomes convinced they’ve stumbled onto a “Da Vinci Code” style conspiracy. Meanwhile, Castle tries to come to grips with the fact that Alexis and Pi have moved in together.
Read More: ‘Castle’ exclusive: ‘It’s always fun to torture Castle a little bit,’ says executive producer
Time Will Tell
Season 6, Ep. 5
A suspect (Joshua Gomez) in a grisly murder claims he has travelled back in time to prevent terrible events from unfolding.
Read more: Chemical weapons, hostage taking and now...time travel?
Number One Fan
Season 6, Ep. 4
A desperate murder suspect with a hostage insists on negotiating with Castle.
Read more: Beckett’s back in NYC for good, but Castle might be down for the count
Need to Know
Season 6, Ep. 3
Agents Beckett and McCord arrive to take over Castle and the guys' investigation into the death of a former child star, creating tension in the precinct.
Read: Beckett heads back to NYC for a case, but refuses to be 'castled' by her fiance
Season 6, Ep. 2
Beckett races to find a stolen toxin capable of killing thousands of people; Castle has less than 24 hours to live after being exposed to the chemical weapon.
READ: The lovebirds might be engaged, but does Castle really only have a day to live?
Watershed - FINALE
Season 5, Ep. 24
An interview with a federal law enforcement agency forces Beckett to reconsider her career and her relationship with Castle; a young woman's body is found inside a flop house's water tank.
Read more: 'Castle' finale: It might not be happily-ever-after for Castle and Beckett
Gallery: Nathan Fillion: The king of 'Castle'
First aired on May 13, 2013.
The Human Factor
Season 5, Ep. 23
When a government whistleblower is murdered, Beckett and Castle must figure out who is responsible and determine why Homeland Security is trying to take over the case.
Read more: The master of hijinx himself gets pranked by Beckett (again!)
Gallery: The many faces of (stunning!) Stana Katic
First Aired: May 6, 2013
Season 5, Ep. 22
When Beckett steps on a pressure-sensitive bomb, the team searches for a way to save her while Castle distracts her by talking about their relationship.
First Aired: April 29, 2013
The Squab and the Quail
Season 5, Ep. 21
When Beckett is tasked with protecting a charming billionaire whose life is in danger, she reflects on her relationship with Castle; consumed with jealousy, Castle tries to solve the case as quickly as possible.
First Aired: April 22, 2013
The Fast and the Furriest
Season 5, Ep. 20
Beckett and Castle discover giant footprints at the site of a vicious murder, leading the team to wonder if Bigfoot is the killer.
Read more: It's Castle vs. Big Foot...and Castle vs. Beckett's skepticism
Gallery: 'Castle' cases worth writing about
First Aired: April 15, 2013
The Lives of Others
Season 5, Ep. 19
While stuck at home with a broken leg, Castle believes he witnesses a murder in the apartment across the street.
Read more: The 100th episode has a Hitchcock homage with housebound Castle witnessing a murder
First Aired: April 1, 2013