The probe of the murder of Cal's friend, a journalist who was investigating political corruption, tests Cal's relationship with Reynolds and the FBI. Meanwhile, Cal is uncomfortable with Emily's newfound interest in dating.

A young woman's disappearance leads to an investigation of crime in the pornography industry.

Foster's boyfriend, Dave Burns, is kidnapped, and Cal must track him down with the help of Burns' mysterious ex-partner.

Cal and Zoe are called to witness the execution of a man they helped send to death row 17 years before---and face the possibility that he's innocent.

Cal risks being exposed as a gambler when a fighter is found dead in an underground fight club. Meanwhile, Foster's romance with Burns is threatened when she discovers a secret.

When a gubernatorial race in Virginia turns deadly following the death of a young woman at a campaign event, the Lightman Group is tapped to explore conflicting scenarios of foul play.

Torres recalls a difficult childhood and shares an uneasy reunion with her incarcerated half sister after the latter's fellow inmate disappears from a juvenile corrections facility.

After a housing-project shooting, the D.C. police ask Cal to read the face of a paralyzed victim, who can move only his eyes.

Cal confronts unsettling truths in his past as he and his team try to save the lives of an Iraq War vet and his family.

Cal is a witness at the trial of a woman accused of murdering her much-older husband, a business tycoon.

Cal and Gillian look back over events in their lives---including the therapy session at which they met---after a former colleague of Cal's at the Pentagon is killed in a car bombing.

Cal suspects that a charming psychology graduate student is a murderous psychopath, but the young man's teacher (who has a history with Cal) is protecting him. Meanwhile, Loker and Torres probe a claim by a teacher that he saw a UFO .

A protesting farmer parks his explosives-packed tractor near the U.S. Treasury building. Meanwhile, Loker plays babysitter to third-graders stuck in the Lightman Group offices.

Cal, Foster and Reynolds go all in to find a missing finalist from the World Series of Poker in Las Vegas, where Cal must determine if the other players are being straight with him about the disappearance. Meanwhile, an analysis of Loker's latest relationship allows him and Torres to get better acquainted in the process.

Cal spends the holidays in Afghanistan, where he relies solely on an American expatriate to help a mission to find a pair of missing Marines.

A troubled teen who believes he was abducted as a baby wants to learn about his past. Meanwhile, Loker investigates a deadly stampede at a megastore the day after Thanksgiving.

Cal and Gillian probe the murder of a witness in a government case and discover that Agent Reynolds, the star witness in the case, is hiding something in his past.

An old friend of Cal's attempts to pull him into a criminal conspiracy. Meanwhile, the Lightman Group probes a high-school student's murderous threats.

A man is determined to prove that he didn't murder his wife, and his effort to do so puts the Lightman Group in danger.

While vacationing in Mexico, Cal and Emily get involved in the case of a missing American woman. Back in D.C., Foster and Cal's rival, Jack Rader, investigates tainted blood in area hospitals.

Zoe enlists the Lightman Group to probe a college-football star accused of statutory rape; Foster and Loker visit a religious compound to determine if it's a dangerous cult.

A woman with multiple personalities could be either a witness to a murder---or the killer. Meanwhile, the government hires the Lightman Group to question a possible Supreme Court nominee.