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24 Episodes 2012 - 2013
Following four seasons of sexual tension between Castle (Nathan Fillion) and Beckett (Stana Katic), the fifth season opens with the two of them finally embarking on a romantic relationship together. However, they try to keep this new relationship a secret, particularly from their boss, Capt. Victoria Gates (Penny Johnson Jerald). Also, Beckett finally discovers who's responsible for her mother's murder and wrestles with whether she should carry out her personal vendetta against him. Likewise, an emotional Castle finds himself pursuing criminals when his daughter, Alexis (Molly Quinn), is kidnapped, and he receives help from an unlikely source: his estranged father (James Brolin). Several episodes this season give nods to pop culture, including Fillion's role on "Firefly," which is alluded to when Castle and Beckett investigate a murder at a sci-fi convention; and the show's 100th episode, which pays homage to "Rear Window" when an injured and housebound Castle believes he's witnessed a murder.
Episode 1
Mon, Sep 24, 2012 60 mins
In the Season 5 opener, a night of passion forces Castle and Beckett to reexamine their relationship. Meanwhile, they must go up against the people who murdered Beckett's mother and are now threatening Beckett's life; and Beckett clashes with a senator.
Episode 2
Mon, Oct 1, 2012 60 mins
Beckett returns from her suspension and joins Castle in investigating the death of a local TV weather forecaster. Meanwhile, she and Castle try to keep their new romance a secret at work.
Episode 3
Mon, Oct 8, 2012 60 mins
Castle and Beckett look into the auction of a storage unit, which may be tied to a woman's murder, and soon they find themselves mingling with both treasure hunters and socialites.
Episode 4
Mon, Oct 15, 2012 60 mins
Castle and Beckett head to the Hamptons for a romantic getaway, but their plans go awry when a man dies in Castle's pool and they assist the small-town police with the ensuing homicide investigation.
Episode 5
Mon, Oct 29, 2012 60 mins
Castle becomes the prime suspect in a ritualistic killing, and Beckett's loyalty toward him wavers in the face of mounting evidence.
Episode 6
Mon, Nov 5, 2012 60 mins
A homicide occurs at a sci-fi convention, forcing Castle and Beckett to deal with zealous fans and pompous celebrities as they investigate the crime.
Episode 7
Mon, Nov 12, 2012 60 mins
Castle and Beckett investigate the murder of a rock star who was being filmed by a documentary crew, and the film crew decide to keep their cameras rolling and record some crime-solving skills in action.
Episode 8
Mon, Nov 19, 2012 60 mins
Castle and Beckett must go on the run with a murder witness they're protecting from the mob, and because they had to move quickly, they find themselves unarmed and stranded with no phone in the middle of the night.
Episode 9
Mon, Dec 3, 2012 60 mins
A man resembling Santa Claus is found dead in Central Park, and Castle and Beckett uncover some unsavory things about him as they investigate his murder. Meanwhile, Castle and Beckett prepare to celebrate their first Christmas as a couple.
Episode 10
Mon, Jan 7, 2013 60 mins
Castle and Beckett investigate a divorce attorney's homicide and compile a long suspect list full of angry ex-spouses. Meanwhile, Alexis' mom nurses her ill daughter back to health at the loft, where Beckett is also bunking while her place is fumigated.
Episode 11
Mon, Jan 14, 2013 60 mins
A promising DJ is murdered at an album-release party for a fading pop star, and the investigation takes Castle and Beckett inside the city's music industry. One lead points to a troubled teen, whom Esposito tries to put on the right path.
Episode 12
Mon, Jan 21, 2013 60 mins
The founder of an adult-video franchise featuring college coeds is killed, so Castle and Beckett probe his personal life to uncover clues about his murderer. Meanwhile, Castle disapproves of Alexis' new video blog, fearing she's exposing too much info about her private life.
Episode 13
Mon, Feb 4, 2013 60 mins
Castle and Beckett discover evidence that links a senator to a young woman's murder.
Episode 14
Mon, Feb 11, 2013 60 mins
Castle and Beckett investigate the homicide of an emerging reality star who was part of the cast of "The Wives of Wall Street." Meanwhile, Castle runs into trouble as he searches for a Valentine's Day present for Beckett.
Episode 15
Mon, Feb 18, 2013 60 mins
Part 1 of 2. Castle and Beckett's homicide case exposes a kidnapping plan centered on the daughter of a rich businessman from the Middle East.
Episode 16
Mon, Feb 25, 2013 60 mins
Conclusion. Castle seeks assistance from a shady individual to rescue Alexis after the FBI proves unsuccessful, and he learns that his daughter's abduction is possibly tied to something more disastrous than he first realized.
Episode 17
Mon, Mar 18, 2013 60 mins
A DVD is thought to be haunted when people start to die after viewing it, and when Castle mistakenly watches the DVD, he fears for his own safety.
Episode 18
Mon, Mar 25, 2013 60 mins
A murder investigation leads to an Irish crime family Ryan knows from his days as an undercover cop, so he steps back into his old role to help solve the case, complicating his relationship with his wife in the process.
Episode 19
Mon, Apr 1, 2013 60 mins
Castle grows bored because he's stuck at home with a broken leg, but things get interesting when he witnesses a murder in an apartment across the street.
Episode 20
Mon, Apr 15, 2013 60 mins
Giant footprints are discovered at a violent murder scene, leading some to believe Bigfoot is the culprit. The ensuing investigation then leads Castle and Beckett into a world of primate research, big-game hunting and myths.
Episode 21
Mon, Apr 22, 2013 60 mins
Beckett must protect a charismatic billionaire whose life is in peril, prompting her to ponder her romance with Castle as it reaches a standstill. Meanwhile, Castle begins feeling insecure, so he tries to get the billionaire's case solved quickly.
Episode 22
Mon, Apr 29, 2013 60 mins
Beckett steps on a bomb, so the team look into disarming it while Castle keeps her preoccupied by squabbling with her over the origins of their romance.
Episode 23
Mon, May 6, 2013 60 mins
A whistle-blower is killed and the crime scene gets sealed by Homeland Security. As Castle and Beckett continue to pursue the case, they learn that the cause of death was not a car bomb but a missile from a military drone.
Episode 24
Mon, May 13, 2013 60 mins
In the Season 5 finale, Beckett interviews with a federal agency, prompting her to reexamine her personal and professional lives. Meanwhile, the team investigate the death of a young woman who was found floating inside of a water tank in a flop house.