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Season 4
Season 4 is available on DVD.   

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Season 3   Season 5

The fourth season of Castle premiered on September 19, 2011 on the ABC network in the United States. The finale was on May 7, 2012. This season actress Penny Johnson Jerald join the cast of Castle.


Main characters

Recurring characters

Broadcast episodes

Image Title Writer(s) Director(s) Airdate #
Castle-Rise.jpg Rise Andrew W. Marlowe Rob Bowman September 19, 2011
As Beckett fights for her life, Castle attempts to find the person responsible for the shooting. Meanwhile back at the precint, Ryan and Esposito try to adapt to the new captain in charge.
HeroesandVillains.jpg Heroes and Villains David Amann Jeff Bleckner September 26, 2011
When an ex-con is mysteriously slain in an alley, Castle and Beckett believe a vigilante is behind the murder. But efforts to identify their suspect are thwarted when they discover that he roams the city in a costume — and may indeed be a Superhero. Can they capture and unmask the killer before he strikes again?
HeadCase.jpg Head Case David Grae Holly Dale October 3, 2011
A murder scene complete with lots of blood but no victim and high tech life-extension science are all part of the investigation as Castle and Beckett try to solve a murder without a body. Meanwhile, Alexis waits to hear news about her application to Stanford.
KickTheBallistics.jpg Kick the Ballistics Moira Kirland Rob Bowman October 10, 2011
While investigating the mysterious shooting death of a young woman, Castle and Beckett face a cop’s worst nightmare when they discover that the gun used in the killing is Det. Ryan’s old service weapon – the one that was stolen by the serial killer, 3XK. Now with the clock ticking, the team must work to solve the murder, track down 3XK and retrieve Ryan’s gun before the killer strikes again.
EyeOfTheBeholder.jpg Eye of the Beholder Shalisha Francis John Terlesky October 17, 2011
A wealthy museum patron is a suspect when a valuable sculpture is stolen. Castle and Beckett investigate the theft with the help of an insurance investigator who sets her sights on Castle.
Demons.jpg Demons Rob Hanning Bill Roe October 24, 2011
Castle & Beckett confront the possibility of paranormal foul play when a world renown ghost hunter is mysteriously murdered while investigating a haunting at a legendary New York mansion.
Cops&Robbers.jpg Cops & Robbers Terence Paul Winter Bryan Spicer October 31, 2011
When Castle and Martha are taken hostage by a crew of bank robbers dressed in hospital scrubs and using classic television doctor names, Beckett finds herself on the outside, desperately trying to rescue them — which proves to be even more difficult with a by-the-book hostage negotiator watching her every move. Castle becomes the de facto leader of the hostages, and discovers that the robbery is actually a skillfully orchestrated distraction for an even more sinister plan. But with Castle stuck on the inside and Beckett on the outside, will either be able to foil the bank robbers’ plans before it is too late?
HeartbreakHotel.jpg Heartbreak Hotel Elizabeth Davis Bill Roe November 7, 2011
During the investigation of the murder of an Atlantic City casino owner at an abandoned warehouse, strong leads emerge for the team in both New York and Atlantic City. As Beckett and Capt. Gates work the New York leads together, Castle naturally chooses to join the detectives for the road trip to "America's Playground," hoping to help solve the case while throwing an impromptu bachelor party for Ryan.
KillShot.jpg Kill Shot Alexi Hawley David M. Barrett November 21, 2011
A sniper is on a killing spree in New York City. In a race against time and having absolutely nothing to go on except a killer with no apparent motive but to instill terror, this could be the team's toughest case yet. Things just get even more complicated when Beckett begins to experience increasingly strong moments of PTSD, which she tries hard to hide from Castle and the others.
Cuffed.jpg Cuffed Terri Edda Miller and Andrew W. Marlowe John Terlesky December 5, 2011
Castle and Beckett have disappeared, leaving the rest of the detectives searching for them. Elsewhere, Castle and Beckett find themselves handcuffed together in bed in a locked room but have no idea how they got there.
Till death do us apart.jpg Till Death Do Us Part David Grae Jeff Bleckner January 9, 2012
When a ladies man is murdered, Castle and Beckett are led through a string of deserted women, a lot whom had motive to kill him, and Ryan's bride-to-be Jenny holds a link to the case.
Dial m for mayor.jpg Dial M For Mayor Christine Boylan Kate Woods January 16, 2012
A woman is found dead in a car from City Hall, last used by Mayor Weldon. As Castle remains objective to the Mayor's involvement in the case due to his friendship with him, Captain Gates urges Beckett to take him off of the investigation. Then things take a dark turn when Castle is informed that the case linked to Johanna Beckett's murder.
AnEmbarrassmentOfBitches.jpg An Embarrassment of Bitches Rob Hanning Tom Wright January 23, 2012
A famous dog trainer is killed, strangled by a dog leash in his hotel room. But the case gets a lot more peculiar when the avenues of investigation lead to a secret dog breeding program, drugs and strangest of all to TV reality star Kay Cappuccio.
Castle noir514120123122058-1.jpeg The Blue Butterfly Terence Paul Winter Chuck Bowman February 6, 2012
Castle obtains a diary, connected to a double homicide that occurred 65 years ago and the murder of a treasure hunter in the modern day. With the aid of the diary, that tells the story of a hard-boiled detective and his romance with a gangster's lover, he and Beckett search find the identity of the killer and the answer to the mystery of the enigmatic Blue Butterfly.
Pandora.jpg Pandora David Amann Bryan Spicer February 13, 2012
(Part I) A killer Castle and Beckett are searching for is found out to be a part of an international conspiracy; and Castle reconnects with a gorgeous CIA operative. Meanwhile, Alexis finds an internship which Castle is less than pleased about.
Linchpin.jpg Linchpin Andrew W. Marlowe Rob Bowman February 20, 2012
(Part II) Castle and Beckett race against time to find Nelson Blakeley's killer and his 'linchpin' that if exploited will devastate America and plunge everyone into World War III.
Once upon a crime.jpg Once Upon a Crime Kate Sargeant Jeff Bleckner February 27, 2012
A woman dressed as Little Red Riding Hood is found dead in Central Park, wrapped in a red cloak with beastly claw marks on her body. And as more faiytale murders follow, Castle and Beckett follow a series of lies and dark secrets to find the killer before he takes away another happy ending.
A Dance with Death.jpg A Dance With Death Moira Kirland Kevin Hooks March 19, 2012
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. But as they delve into Odette's past, they discover that this reality starlet was harboring a shocking secret that may have led to her death.
Castle-47-Seconds.jpg 47 Seconds Shalisha Francis Paul Holahan March 26, 2012
When a bomb explodes at a protest rally killing five people, Castle & Beckett realize the key to solving the case is to reconstruct the 47 seconds prior to the explosion. Using video and witness accounts, they uncover the shocking truth about who planted the bomb.
The Limey.jpg The Limey Elizabeth Davis Bill Roe April 2, 2012
A devilishly handsome detective from Scotland Yard, Colin Hunt, teams up with Castle & Beckett to find the person responsible for the murder of his friend's daughter. Also, Charles Shaughnessy plays Nigel Wyndham, the Deputy General at the British Consulate who Castle and 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.
Headhunters.jpg Headhunters Alexi Hawley John Terlesky April 16, 2012
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.
Undead Again.jpg Undead Again Christine Boylan Bill Roe April 30, 2012
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.
4x23.png Always Terri Edda Miller and Andrew W. Marlowe Rob Bowman May 7, 2012
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.
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