When the body of a local college fraternity student is found gruesomely murdered, Castle has to go undercover as a professor in order to gain access to the victim’s world….

Picking up the morning after, Castle and Beckett now have to decide if they’re a couple or was it just a onetime deal. But before they can tackle that, they…

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…

It was longtime Castle friend Mayor Weldon’s political clout that allowed Castle to partner up with Beckett. But now, when a woman is found dead in a car that traces…

Detective Beckett fights for her life as Castle, plagued by guilt over his role in the events, struggles to uncover who’s behind her brutal shooting. Meanwhile, back at the precinct,…

After breaking the news to friends and family about the divorce, Lena has to deal with her son Mason’s growing pains; Martin secretly tries to atone for an oversight and…

Part 1 of 2. Mac and Charlie fake their deaths to avoid the wrath of Mac’s father who was released from prison and is out for vengeance.

CTU raids Marwan’s hideout, but he manages to slip through their fingers. Luckily, Jack locates a lead that may help him identify Marwan’s next target. Tony becomes suspicious of Michelle’s…

Jack learns the identity of a man who may be able to lead him to Marwan. He forces Dina to help him in a mock hostage situation that will get…

Jack and Curtis finally learn the location of the override device. They try to trap the architect of the terrorist strike before the remaining nuclear plants go critical. Tony pushes…

Jack and Paul visit the defense contractor who employed Marwan, but the company executives put their own interests ahead of CTU’s and take major steps to destroy evidence. After a…

Jack and Tony are able to trace Dina’s location, but Behrooz slips through their fingers. Dina demands a full pardon for her son in exchange for information on the override…

Jack and Audrey hide out with an embittered Tony as Audrey makes a positive ID of the man from the kidnapping. Marianne successfully diverts suspicion from herself, leading Driscoll to…

Jack initiates a fierce gun battle with the terrorists as he races to rescue Heller and Audrey before the military strike begins. Dina questions her own dedication to their cause…

Jack takes Audrey to ID the man she recognized at the compound, but the terrorists get there soon after and pin them down. Jack must call on an old friend…

Jack and Driscoll agree to work together when the police make a critical error in dealing with Kalil. Heller and Audrey take drastic action in the hopes of avoiding the…

Jack tracks Kalil with Chloe’s aid, but is forced to watch helplessly as Andrew is tortured for information. Behrooz pleads with his parents when they order him to bring Debbie…

Jack pushes Driscoll to reinstate him in the wake of Heller’s kidnapping. He finds himself working as a subordinate when the Field Ops team goes to pick up Andrew. Behrooz…

Eighteen months have elapsed since the conclusion of Day 3. A commuter train bound for Los Angeles explodes. A man steals a suitcase from a passenger in the wreckage and…

Jack pushes the envelope in an attempt to force Saunders to disclose the location of the missing vials. Sherry meets with David to discuss her terms, while Wayne breaks into…

Tony works to free Jane from CTU before Saunders can harm Michelle, but Chloe and Jack become suspicious of his activities. Sherry meets with Palmer’s political rival and proposes a…

Jack and Tony clash as the time for the hostage exchange draws near. Keeler meets with Palmer and demands his resignation, while Wayne begins a secret operation against Sherry.

Jack and Ramon struggle to evade the authorities, while Palmer must shut the debate down because of the prison break. Kim accidentally stumbles on to Gael’s secret communications, but she…

Jack’s efforts to break Ramon out of prison go awry when they are captured by a group of inmates during the riot. Chloe unwittingly stumbles on to Jack’s drug problem…

Jack and Chase quarrel over Chase’s relationship with Kim. Meanwhile, they learn of a lead to the possible whereabouts of the virus after rading a crackhouse. Linda breaks up with…

When he realizes that his first choice for Vice President faces an uphill fight for nomination, Jed nominates a congressman that none of the staff can get excited about; Josh…

As the search for Zoey continues, Walken takes a hard line against the kidnappers that could contribute to her death; Danny releases the Shareef story, and the revelation creates a…

The 15-year old son of an Iranian leader needs a heart transplant in the U.S. Problem is, the only man who could do it is an enemy of the Iranian…

Lisbon fears that the serial killer Red John is drawing Patrick Jane into a trap when the CBI team investigates the murder of a young girl and the abduction of…

After police pull over a driver and arrest him for a concealed weapon, a car crashes into their patrol car with a dead man behind the wheel. The arrested man…

On her way to film a documentary (apparently about a union dispute), Captain Stottlemeyer’s wife, Karen, is badly injured when her car is struck by a tow truck whose nonunion…

Lynette learns that no good deed goes unpunished when she momentarily befriends the mean Mrs. McClusky. Susan’s mother decides to try and jump start her and her daughter’s love lives….

Dexter shows up at his 20th high-school reunion with the intention of confronting the former prom king. Elsewhere, an investigation into a heinous murder with religious overtones leads Dexter to…

Dexter and Arthur find themselves on a collision course, as Debra unearths a shocking long-hidden truth, Rita admits her marriage to Dexter is troubled, and Batista and LaGuerta face the…

Miami Metro is just one step away from discovering the identity of the Trinity Killer. And Dexter can’t let that happen. Dexter must take drastic action to buy himself time…

“If I Had a Hammer” is the sixth episode of the fourth season of the Showtime television series Dexter. Dexter knows it’s only a matter of time before Miami Metro…

“Dirty Harry” is the fifth episode in the fourth season of the Showtime television series Dexter. Recent events spur Dexter into his own investigation of the Trinity killer. His motivations…

“The British Invasion” is the twelfth episode and finale of the second season of the American television drama series Dexter, which first aired on December 16, 2007 on Showtime in…

Dexter must make a massive decision that will have an effect on all those he holds close. Lila meanwhile is back with a secret to blackmail Dexter.

Dexter realizes it won’t be easy to end things completely with Lila. Dexter tries to stay ahead of the investigations as the manhunt for the Bay Harbor Butcher intensifies. An…