Maggie Cartwright appears to have simply walked away from every thing in her life, having left everything of hers behind. Later a ransom note appears on her mother's email list demanding a million dollars for her safe return.

Eleven-year-old Gabe Freedman is separated from his father on the subway to Yankee Stadium.

Annie Miller disappears on her way to school. The group looks into her disappearance, with their suspects ranging from the local mayor, to Annie's godfather, all the way to a young man working for the father of her best friend. Twenty-four hours after Annie's disappearance, her best friend Siobhan Arintero also vanishes, leaving only a collection of videos to help find the two girls.

A bride disappears at her own wedding and suspicions of kidnapping. Meanwhile, the team explores the relationship between the newlyweds, who were lived together for a little while.

When the team tries to plot a strategy after they find out that Samantha has been shot and that she might be critically injured in the hostage crisis situation. Jack makes a deal with Berry so that Sam can get help and Jack goes in there and takes Sam's place.

A school bus is abducted by kidnappers who demand more and more for ransom.

When a 14-year-old violinist disappears on the night of a concert, the team follows her and her valuable violin's trail and Samantha bravely tries to recover from the gunshot wound.

Malone searches for a missing woman whose description matches those of a series of murder victims from a 12-year-old case only to learn that Graham Spaulding is pulling the strings, and drawing on incidents in Jack's past to lure him into a trap.

The team Search for a missing motivational speaker only to find that there is an abundance of suspects,The find out that they man is no who he appears to be.

A 12 year old boy (Jake Thomas) goes missing. The team discovers that the boy had a rough 24 hours leading up to his disappearance. He disappeared in the middle of the school day, the only clues a broken miror, a discarded hall pass, and blood on the wall....until a picture of him is sent around the school.

A new lead reveals details about a missing woman's sexual history.

When a nanny, and the child she took care of, disappear from her employers' home after being fired by them, the team must determine if the nanny is a kidnapping victim, or a kidnapping suspect.

When a juror disappears, the initial belief is that his disappearance is connected to the trial that is being covered, where a young man named Terrell Brooks has accused of murdering Janelle Billingsley. When the team investigates further, they learn that not only did Ducek change his will to leave his younger lover a fortune, but he has been rather mysterious about a painting from his youth in Czechoslovakia. The team soon begins to believe that Ducek is really a former Nazi soldier named Klaus Reinhardt.

When a spoiled heiress in her early twenties is kidnapped, the team has to work against the clock to save Chelsea, who is being featured on a website giving fans the option to choose whether she lives or dies. As they continue to investigate her disappearance, the team learns that Chelsea had finally been starting to grow up, but she may not have time to enjoy her new life.

Danny is skeptical when the pregnant girlfriend of his missing estranged brother, Rafael ""Rafi"" Alvarez, and mother of their 9-year-old son, tells him that Rafi has transformed himself into a responsible family man, who recently obtained a loan to open his own body shop. But Danny's investigation uncovers that Rafi has been seen with a convicted car thief, and the large sum of cash he'd been flaunting for his purchase of a body shop didn't come from the bank. Though Jack makes the point that Rafi may have legitimate explanations for the suspicious circumstances, Danny braces himself for the very real possibility that his brother may have put himself in harm's way.

Martin and Danny are ambushed by Emil Dornvald, who ends up killing the prisoner they are transoprting. Martin is in serious condition, and a barely wounded Danny is at the end of his rope as he tries to find the man who put Martin in the hospital in critical condition. Jack has his hands full with keeping Danny in check and hunting down Emil Dornvald, the mercenary who had previously worked for General Gamba. Things get sticky when Victor Fitzgerald and Tom Banes of Homeland Security get involved, determined to make a deal with Nuru, whom Jack believes isn't the friendly that Homeland Security believes he is.

The four-year-old adopted son of a celebrity couple is kidnapped, and the team must determine if the reason has to deal with the parents' status or the boy's own Sudanese origin.

The team searches for a missing mother who they believe may be searching for her son, who is also missing.

When a woman disappears after her boyfriend is killed by the police, the team suspects gang involvement. Later, Sam learns she's pregnant.

When a college student disappears after making racial remarks in a class, the team wonders if those may be directly connected to his disappearance.

Malone and his team start off the new year investigating how a private investigator might have went missing.