Ryan and Max call in the FBI when they find out where Lily and her "family" are staying. However, Mike has his own plan for taking on the killers. Meanwhile, Joe tries to cope with his new working arrangement with Lily, and Luke deals with the aftermath of Giselle's stabbing.moreless
Ryan receives a call from two of the subway killers, who begin a deadly game with him. Meanwhile, Joe's cover identity is at risk when a local reverend realizes who he is.
One year after Joe Carroll's death, Ryan is trying to adjust to going back to his ordinary life. However, a new series of killings raises the question of whether Joe is actually dead or if his legacy has lived on.moreless
Megan and Tommy attend her father's exhumation but it only yields more questions. Joan suggests Megan check out her father's patient files for a connection to his death.
An accused murder violently escapes from a transport van and soon the witness in his case is found dead. He heads straight to Megan pleading that he's being framed and didn't commit the murder. It's up to Megan to find the truth.moreless
A plane crash in Philadelphia takes out the city's main power grid making it difficult for Megan and the rest of the team to conduct the necessary autopsies. While investigating the plane crash, Tommy and Riley are involved in a serious car accident.moreless
Megan and Tommy must determine who killed a schizophrenic teenage girl at a mental institution. To make things interesting, a patient claims that the murderer really meant to kill her, and they are being stymied by the ward director.moreless
An investment banker on trial for defrauding investors is kidnapped leaving court and later surfaces in a video as having been killed. Tommy and Adam have to determine if he faked his own death. Megan learns more about her father.moreless
When Tommy is discovered at the scene of a young girl's murder, covered in blood, Megan is his only hope.
A woman's savage murder leads Megan and Tommy to a neighbor inflicted with rabies who bites Tommy and is diagnosed with rabies. Kate calls in the new health commissioner, Dr. Charles Stafford, to help Megan when a second case of rabies is discovered sans bite marks.moreless
Kate begins to suspect that the handsome and mysterious Sergei, with whom she's having a tryst, may be involved in the death of a young Russian girl.
Working with Tommy on a vigilante killing, Megan meets up with a grief counselor who offers to help her deal with issues about her father's suicide.
The shooting death of a New York mobster's son creates a tense situation when the mobster threatens to find and kill the person responsible. Megan and the team must hurry to solve the case after one suspect is killed.moreless
Megan and Tommy must separate out fact from fiction to determine if a child's murder was severe child abuse or something else.
While Kate comes under fire from D.A. Russell, Megan has cracked the case but can't tell her team. As long as the killer has Lacey, Megan must keep what she's learned to herself.moreless
As Megan returns to work months after Peter's death, she is thrown together on a new case with a detective from her past. A serial killer is seeking out young war veterans but the case hits close to home for Megan when the killer takes Lacey hostage.moreless
Beckett is on the hunt for the man who shot her which puts Castle in a precarious position. Soon everything will be out in the open and nothing will be the same for the 12th Precinct.moreless
The only witness to a murder victim with human bite marks on his body insists it was a Zombie attack. Castle, Beckett and the rest of team must delve into New York's Zombie subculture to find the killer.moreless
His relationship with Beckett strained, Castle teams up with Detective Ethan Slaughter from the city's gang unit. But Slaughter's kind of police work could put Castle in real danger.
A dead British model has Castle and Beckett working with D.I. Colin Hunt from Scotland Yard. While investigating, they become suspicious about the activities of the British Consulate's Deputy General. Lanie persuades Beckett that she needs to make a move on Castle, sooner rather than later.moreless
Castle and Beckett must reconstruct the 47 seconds prior to the time a bomb exploded at a protest rally in order to find who planted the bomb.
When a reality dance competitor is found dead in her dressing room, Castle and Beckett find that the scandalous secret she was keeping may have led to her death.
Deceit, betrayal and secrets are all part of the case of fairytale killer. Castle and Beckett find nothing is as it seems after the bodies of two women, one dressed as Red Riding Hood and one as Snow White, are found murdered.moreless
Time is running out as Castle and Beckett race to find "Linchpin" in order to prevent an event that could plunge the country into war. (Part 2 of 2)
An international conspiracy plays into the case of a killer being pursued by Castle and Beckett. A sexy CIA operative with ties to Castle joins in on the case. (Part 1 of 2)moreless
In order to solve the current murder of a treasure hunter, Castle and Beckett must first solve a 1947 homicide that involved a hard-boiled private detective.