The team's newest member, FBI rookie Elena Delgado, formerly of the NYPD, encounters a learning curve as she attempts to help search for missing 20-year-old Dina Kingston.

The backpack and ID of missing college coed Skye Petersen are suddenly dropped off at a thrift store seven years after Jack--and ultimately the legal system--determined she was murdered by her married professor with whom she'd just ended an affair.

The team searches for 25-year-old Korean-American Wendy Kim, who vanishes after a fight with her new boyfriend during her night shift at her parents' deli.

Jack and Danny head to Mexico to find wealthy American vacationer James Costin who was abducted, at the request of James' mother-in-law. While Vivian, Sam, Martin and Elena work the case back in New York, Jack encounters resistance from the locals. The team soon becomes suspicious of James's wife Lucy Costin, convinced she knows more about her husband's disappearance than she is saying.

When the team investigates the disappearance of a man, they find pictures of child pornography in his home office and on his computer - all of the same little girl. However, the man who initially appears to be a pedophile on the run quickly becomes a helpful aid with the good intent of finding this little girl who has been subjected to a life of human trafficking and child prostitution.

This case, a missing 15-year-old school boy, focuses on the emotional anguish of the parents as the team does its best to find him.

Jack's friend Max Cassidy vanishes after leaving a message on his wife Anne's voice-mail. While investigating, Jack realizes that Max was having an affair, and that he has got in much deeper into an espionage case than he should have following the murder of his partner, Jimmy, a man Max had felt was too green for undercover work. Both Jack and Ann fear the worst as the team try to find Max.

While Jack tries to determine what to do about his increasingly frail and delusional father, Sam investigates an unidentified amnesiac woman in the mental ward of the hospital.

The FBI investigates the disappearance of Cole Warren, an FDNY paramedic who was last seen at the hospital after delivering a wounded gang banger. Warren is good at his job and is highly respected. He's stayed in his neighborhood and takes dangerous calls. He was a gang banger himself at one point and managed to get out of that life. He's taken an interest in a young man with the potential to make something of himself and not fall into the spiral that leads so many to crime and violence. Warren's past however catches up with him anyway. Meanwhile, Malone has to deal with his father's funeral and his relationship with Anne Cassidy.

After therapist Gina Hill disappears, the team investigates and initially suspects that one of her patients may be involved. After discussions with Gina's fiancé and her own therapist, the team follows the trail of clues to a bartender named Vince with an unusual ability to get good women to do whatever he wants them to. Martin continues to struggle with his recovery.

The agents investigate the disappearance of Claire Hunter, a prep school teacher who was last seen at her gym the previous evening. She'd had a confrontation with a man at the gym who claims to have seen her subsequently getting into a car. Claire was well respected at her school and always went the extra mile as far as the students went. She had just broken up with her boyfriend Pete a fireman but that proves to be a dead end. When one of her 15 year-old students runs off with her, they can't help but wonder is they're having a relationship. It proves to be far more complicated than that with Claire having to come to terms with the parental abuse she suffered as a child and which her student now faces.

The FBI investigate the disappearance of Andy Reynolds who vanished after appearing in a police line-up in a rape case. He was released by the police but hasn't been seen since. The FBI learn that Andy had served 5 years in a military prison after confessing to to raping a young woman while stationed in Japan. Andy had a steady job working for another ex-Marine, Nelson Wolpert, but seems to have returned to Japan soon after the line-up. Jack Malone heads to Tokyo while the team in New York City continue the investigation. As they continue to gather evidence, the agents come to believe that Andy was innocent of the rape charge he confessed to.

Missing: one suburban housewife. Last seen arguing with a man outside of a Soho gallery. Husband more than a little worried.

A young boy goes missing in a car-jacking. His father worked for a large drug company and would like to sort things out by himself.

An agoraphobic journalist goes missing.

A bike messenger goes missing. The team finds out that he is in fact only 15, not 18 as his employers thought. When delving into his family life, they find some quite disturbing information.

The team members search for a pregnant, HIV-positive woman, Megan, who vanished moments after she and her husband saw the ultrasound of their healthy late-term fetus.

A rich daddy's son, Breck Mulligan, disappears after his job at a shelter where he is doing community service to which he was sentenced. A surveillance tape shows that he was attacked and possibly abducted in front of the shelter.

Pete and Joanie McMurphy report their teen daughter, Kelly, whom he coaches intensely aiming at Olympic ice skating, missing. The team finds a peeping Tom a false trail. The team finds the school has a problem with doping, and she's obsessed with the death of her doting, more gifted elder brother and mentor Jason, whose death wasn't an accident but the result of steroids for lack of alternative to meet Pete's unrealistic expectations.

A family - father, daughter and son - go inexplicably missing. The investigators find out from a school friend that the son witnessed something he shouldn't have.

Two teenagers go missing at the same time - a black boy and a white girl. The team is faced with the difficult task of finding both teens, which is made incredibly difficult by all the media coverage given to the white teen.

Former ADA Jennifer Nichols, now senior partner in a 'social' law firm, disappears after a visit form her allegedly stalking-prone ex Eric Jensen, but he proves inoffensive. She recently visited in jail Grant Stoker, the only caught member of a violent robber gang, and tricked him into betraying the mastermind. Jack suspects travel agency entrepreneur Allen Davis, who dated her but was bothered in the restaurant by the pregnant Lucy Stoker, adulterous wife of Grant who took the blame for her sake. Smelling a rat in the FBI office, Davis seizes the initiative drastically.

A boy says that his father has abducted a young child, but the investigation reveals that he may have been abducted too and that the man is not his father.

A wife and mother secretly working as a stripper disappears, and one of her co-workers turns up dead. Elena takes a job there to investigate undercover, and Danny becomes one of her "clients."

The team searches for a 911 operator.

A teenage girl's escape from a juvenile detention facility could be related to the fateful night that got her in trouble and her older sister whose life may be in jeopardy.

An Albanian mobster's son disappears along with his mistress. Jack has a volatile past with the man, and hopes to use this as an opportunity to bust him for kidnapping.

The disappearance of a Hurricane Katrina survivor now living in New York City is related to a mysterious gold watch and a tragic incident that took place during the rescues.

A mentally disturbed woman disappears after a priest performs an exorcism on her. Everyone suspects that she was having strange visions, but the investigation reveals that she may have witnessed a real murder.

Jack goes undercover as a player at an illegal poker club in search of clues to a young member's disappearance. Then he is taken captive by a woman (Thompson) who believes he was hired to kill her.

The disappearance of a social worker could be related to a bad decision he made that resulted in a young child's death.

The disappearance of a dying woman desperate for a miraculous cure appears to be connected to a couple of con artists trying to take advantage of her.

The disappearance of a teenage high school basketball star exposes the shady underside of college basketball recruiting, and Jack and Anne have to deal with her miscarriage.

The disappearance of an air traffic controller appears to be connected to an undocumented plane crash involving drug traffickers.

The investigation into the disappearance of a competitive eater turns up a reporter holding secrets about his past, a gambler trying to fix matches, and a prostitute and his dead pimp.

An artist's disappearance is connected to a traumatic experience from her high school days that still haunts her.

A water treatment plant supervisor disappears, and detectives discover that he is running from his old life in Arizona, where he may have been involved in a robbery and the disappearance of one of his friends.

The team searches for a missing female tourist; when a thug abducts Elena's daughter from home, Jack quickly dispatches Danny and Martin to find her.

A prominent congresswoman disappears on a boating trip, and is later found dead. The investigation suggests that it may be related to her vote on a controversial offshore drilling deal, but Jack is positive that her husband is involved.

A fifteen-year-old girl who is living with her grandfather disappears after last being seen at an Internet Cafe. Samantha's estranged sister makes an unexpected visit.

Sam's sister goes missing, so Sam decides to look for her without consulting with the rest of the team. Throughout her investigation, Sam's past unfolds.

When a young, interracial boy goes missing, race and money appear to play the starring roles in the investigation.

The team searches for a stuntman who went missing shortly after completing a dangerous, fiery stunt. They discover that he received a death threat minutes before he vanished from the film set.

A divorce court judge goes missing, and the team finds a link to a woman from his past.

A girl disappears on prom night. Meanwhile, investigators discover that her drug-addicted boyfriend, believed to have been dead for months, may still be alive.

The team takes on the case of a teenage girl who disappears after joining a cult, while Elena and Carlos continue their custody battle for Sophie.

A Sudanese boy adopted by a high-profile New York couple disappears, and it is connected to a Sudanese man trying to extort the couple, claiming that he is the child's biological father.

A crime scene cleaner and his daughter are missing, and the case is connected to the daughter's possible sexual assault, and her self-esteem issues about being considered overweight.

A television reporter's disappearance is tied to her son's torture and death in a Guatemala prison. Jack is forced to bring in the CIA to help crack the case.

A young woman disappears after her boyfriend is killed in a police shooting. Agents believe the disappearance is connected to the girl's brother, a notorious gang leader who had a falling-out with her.

A woman disappears after an office shooting, but the case is tied to a custody battle and accusations of molestation.

When a serial killer eludes capture in Nevada and escapes with his son to New York City, the crew picks up the trail with the help of Las Vegas CSI's Gil Grissom. Part two of a crossover with "CSI: Crime Scene Investigation."

A college student disappears after his racist statements are posted on an Internet video site, but the case reveals a secret about the student's racial identity and his real father.

Detectives investigate the disappearance of an ultimate fighter, and Samantha tracks down her baby's father.

While the team investigates the disappearance of an ex-con who served time for embezzlement, Agent Johnson gets a possible break in her case involving the kidnapping of a young woman.

A missing department store Santa Claus turns out to be a brilliant mathematician who dropped out of college after having a crisis of conscience.

The disappearance of a private investigator is connected to a foster child in his building that he was trying to help.

The disappearance of a VA hospital worker takes an unexpected turn when the FBI discovers that she's part of a plot to blow up a military building on a college campus.

Jack is shot and left for dead after he goes out on his own and follows a lead in Vivian's human sex slave trafficking case.

While Jack fights for his life, the team takes on a case involving the disappearance of a teenage heart transplant recipient who was looking for information about the boy whose heart she received.

A despised businessman who wakes up from a coma after three years disappears, and Jack leaves the hospital to come to the aid of a young girl in danger.

The team discovers that a missing woman recently won $32 million in the lottery, but was it her ticket? Meanwhile, Jack begins investigating the father of Samantha's child.

The team searches for a good Samaritan tow-truck driver who is running from and seeking redemption for a horrific episode from his past, and the bureau appoints Jack a psychiatrist.

While the team searches for connections between a group of people abducted from a coffee shop, Jack is up for review and Samantha goes into labor.

A man whose daughter disappeared years earlier disappears himself while searching for another lost child. Meanwhile, Jack is relegated to desk duty as the new boss comes in.

A designer is kidnapped, and the woman's boss, father, and lover are all persons of interest. Meanwhile, Jack contemplates a job offer from the private sector.

Jack helps look for a white-collar criminal who has escaped from prison and may be tied to a multi-million dollar bank heist

A teenage boy's disappearance appears to be related to either his father's job busting counterfeiters for the government, or selling tests to classmates at his prep school.

Agent Medina makes a controversial decision to take manpower away from a case involving a missing woman and move it to an Amber Alert case.

A bank employee's disappearance is tied to $100,000 in stolen money and an unwanted pregnancy from the woman's past.

While investigating the disappearance of a paraplegic man, the FBI discovers that an insurance fraud investigator was harassing him, and that he was involved with a group that busted sexual predators.

Jack takes Samantha with him to Los Angeles to help investigate the disappearance of the COO of an airline charter business, but he also has an ulterior motive.

A medical resident's disappearance is connected to two of her former foster brothers, who are in trouble with the mob.

The disappearance of a mean spirited, self-centered weatherman who had recently tried to change his ways leads the FBI to a group of Civil War reenactors.

A 13-year-old girl torn apart by her feuding parents over custody and visitation rights disappears hours after her mother kidnaps her.

While the team investigates the disappearance of a struggling bar owner who recently discovered a "weeping" statue of St. Teresa, the biological father of Sam's son wants back into his life.

Agent Delgado's former police partner goes missing after an undercover deal goes bad, but Delgado fails to inform Jack that she may have a connection to the real reason why she's missing.

Two suburban wives are abducted by a mob enforcer. But which one is he after, and why?

What appears to be the disappearance of a college student becomes more complicated when the team discovers that the victim is an impostor with multiple identities.

A mother and infant son disappear, but it turns out to be a fake kidnapping to protect them from a dangerous man from the father's past. But it turns out that a dangerous man from the mother's past puts the plan in jeopardy.

The team discovers that a missing trial consultant who helps profile prospective jurors was killed because he was investigating jury tampering in a mob trial.

A missing psychologist may have found evidence that his brother, a convicted serial rapist, is innocent.

While the team investigates the disappearance of a Russian immigrant who was trying to bring her "brother" into the United States, Samantha recovers in the hospital from her automobile accident.

The CEO of a failing ski supply company disappears after his plane crashes in the Pennsylvania woods, and the team thinks it's connected to his millionaire father. Meanwhile, Martin gets new disturbing news about his girlfriend.

A journalist investigating a politician disappears. The team discovers that she checked herself into a mental health facility, but is she checking a source or having a breakdown of her own?

A young woman's kidnapping is accidentally recorded on a pirated DVD bought in Chinatown. The team discovers that it is connected to an ancient Chinese ritual that could result in the victim's death.

Jack's daughter's boyfriend disappears soon after he moves from Chicago to New York to be with her. Samantha struggles with a complication in her home life, and Danny and Elena prepare for their wedding.

A former diver disappears, and his girlfriend is kidnapped. Meanwhile, Jack's daughter wants to move back to Chicago, Sam must choose between Jack and Brian, and Danny and Elena plan to get married that evening.

A wife and mother secretly working as a stripper disappears, and one of her co-workers turns up dead. Elena takes a job there to investigate undercover, and Danny becomes one of her "clients."

The FBI investigate the disappearance of Andy Reynolds who vanished after appearing in a police line-up in a rape case. He was released by the police but hasn't been seen since. The FBI learn that Andy had served 5 years in a military prison after confessing to to raping a young woman while stationed in Japan. Andy had a steady job working for another ex-Marine, Nelson Wolpert, but seems to have returned to Japan soon after the line-up. Jack Malone heads to Tokyo while the team in New York City continue the investigation. As they continue to gather evidence, the agents come to believe that Andy was innocent of the rape charge he confessed to.

Agent Delgado's former police partner goes missing after an undercover deal goes bad, but Delgado fails to inform Jack that she may have a connection to the real reason why she's missing.

The team searches for a missing female tourist; when a thug abducts Elena's daughter from home, Jack quickly dispatches Danny and Martin to find her.

The team's newest member, FBI rookie Elena Delgado, formerly of the NYPD, encounters a learning curve as she attempts to help search for missing 20-year-old Dina Kingston.

The team searches for 25-year-old Korean-American Wendy Kim, who vanishes after a fight with her new boyfriend during her night shift at her parents' deli.

An artist's disappearance is connected to a traumatic experience from her high school days that still haunts her.

A medical resident's disappearance is connected to two of her former foster brothers, who are in trouble with the mob.

The team searches for a good Samaritan tow-truck driver who is running from and seeking redemption for a horrific episode from his past, and the bureau appoints Jack a psychiatrist.

A journalist investigating a politician disappears. The team discovers that she checked herself into a mental health facility, but is she checking a source or having a breakdown of her own?