Castle - Season 4 Episodes

Castle - Season 4

Castle - Season 4

An all new season kicks off with exciting discoveries and challenging cases and a tough, new NYPD captain shaking things up.

Castle S4E1
Episode 1


Detective Beckett struggles to survive; Castle tries to identify the shooter; Ryan and Esposito try to adjust to the new captain.

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Episode 2

Heroes & Villains

Castle and Beckett suspect a costume-clad vigilante is responsible for the mysterious murder of an ex-con.

Castle S4E3
Episode 3

Head Case

Castle and Beckett investigate a crime scene that involves a large pool of blood but no victim; Alexis receives news about Stanford.

Castle S4E4
Episode 4

Kick the Ballistics

When a young woman is shot to death, Beckett and Castle learn the gun used was the one a serial killer stole from Detective Ryan.

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Episode 5

Eye of the Beholder

A sexy insurance investigator (Kristin Lehman) with a secret helps Castle and Beckett when a valuable sculpture is stolen and someone is murdered; a rich museum benefactor (Jessica Tuck) garners suspicion.

Castle S4E6
Episode 6


Castle and Beckett investigate the murder of a ghost hunter who was looking into a haunting at a New York mansion.

Castle S4E7
Episode 7

Cops & Robbers

Martha and Castle are held hostage by bank robbers dressed in hospital scrubs; Beckett's rescue efforts are hindered by a strict hostage negotiator (Dean Norris).

Castle S4E8
Episode 8

Heartbreak Hotel

When a casino owner is murdered at an abandoned warehouse, suspects emerge in New York and Atlantic City; during the investigation, Castle throws an impromptu bachelor party for Ryan.

Castle S4E9
Episode 9

Kill Shot

The team searches for a sniper who is terrorizing New York; Beckett tries to hide her worsening PTSD from Castle and the detectives.

Castle S4E10
Episode 10


Beckett and Castle wake up handcuffed together in bed in a locked room with no memory of how they got there.

Castle S4E11
Episode 11

Till Death Do Us Part

When Castle and Beckett investigate the death of a ladies' man, a twist in the case may disrupt Ryan's wedding.

Castle S4E12
Episode 12

Dial M for Mayor

When a woman is found dead in her car, the investigation leads to New York Mayor Robert Weldon (Derek Webster), one of Castle's longtime friends.

Castle S4E13
Episode 13

An Embarrassment of Bitches

The investigation into the death of a famous dog trainer leads to a reality-TV star.

Castle S4E14
Episode 14

The Blue Butterfly

Castle and Beckett must investigate a mysterious case from 1947 in order to solve the present-day murder of a treasure hunter.

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Episode 15

Pandora (1)

Castle and Beckett discover the killer they are pursuing is part of an international conspiracy and they must work with a CIA agent with whom Castle has a history

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Episode 16

Linchpin (2)

Beckett and Castle must stop a series of events that could result in a war.

Castle S4E17
Episode 17

Once Upon a Crime

When two women are found dead dressed as fairytale characters, Castle and Beckett must race to find the killer before he strikes again.

Castle S4E18
Episode 18

A Dance with Death

When Odette Morton, a contestant on the hit competition show “A Night of Dance,” is found murdered in her dressing room, Castle and Beckett must navigate the case’s many twists and twirls without stepping on each other’s toes.

Castle S4E19
Episode 19

47 Seconds

When a bomb kills five people at a protest rally, Beckett and Castle try to solve the case by reconstructing the 47 seconds prior to the explosion.

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Episode 20

The Limey

A devilishly handsome detective from Scotland Yard, Simon Hunt (Brett Tucker, "Off the Map," "Spartacus," guest stars), teams up with Castle & Beckett to find the person responsible for the murder of his friend's daughter. Also, Charles Shaughnessy ("Days of Our Lives") plays Nigel Winthrop, the Deputy General at the British Consulate whom Castle & Beckett suspect is up to more than just ambassadorial balls and diplomatic luncheons. Meanwhile, Lanie convinces Beckett that she needs to make a move on Castle before it is too late.

Castle S4E21
Episode 21


With tensions rising between Castle and Beckett, Castle finds himself a new partner -- Detective Ethan Slaughter (guest star Adam Baldwin, "Firefly"), a tough and colorful cop from the city's gang unit. But Castle gets more than he bargained for when Slaughter shows him a grittier side of police work that puts Castle in the line of fire like never before.

Castle S4E22
Episode 22

Undead Again

When Castle and Beckett investigate the murder of a man with human bite marks on his body, Castle's wild theories start flying. But none are as wild as what their only witness insists happened - a Zombie attack. As the evidence pointing towards an undead assailant piles up, the team plunges into New York's Zombie subculture to find the killer and bring him in dead, undead or alive.

Castle S4E23
Episode 23


When the murder of an Army veteran puts Beckett on the trail of the man who shot her, Castle must decide how much he's willing to sacrifice to keep her safe. As secrets are revealed and feelings are put on the table, the lives of the detectives at the 12th Precinct may never be the same.