An old friend asks Cal to look into the theft of the formula for a new drug after a knockoff surfaces and causes three deaths. Meanwhile, Gillian and Eli help the U.S. government negotiate the release of two Americans facing execution in Yemen for possession of marijuana.

The episode was rated 7.98 from 512 votes.

The government hires the Lightman Group after receiving information about a plot to assassinate a controversial South Korean ambassador at his son's upcoming wedding. Working together, the team uncovers much more than just a would-be assassin.

The episode was rated 7.98 from 566 votes.

Cal and Ria interview a female soldier who reported her platoon leader for sexual assault. Meanwhile, Gillian and Eli are hired by the Athletic Association to determine if a high-profile basketball recruit accepted an incentive to play for his university.

The episode was rated 7.98 from 640 votes.

Emotions run high when Eric Matheson, accused of murdering his wife, takes the Lightman Group hostage to force them to help him uncover the real murderer.

The episode was rated 7.99 from 467 votes.

At a ground-breaking ceremony for a new community center, an assassin's bullet misses the governor, killing a young female staffer instead. When the governor jumps nine points in the polls, Cal immediately suspects the governor, or someone close to him, for what he calls a "bullet bump."

The episode was rated 7.99 from 400 votes.

Before pardoning a notorious gang leader, who has been nominated for a Nobel Prize for his anti-gang work while in prison, the Governor wants Cal and Ria to assess whether he has really changed. Meanwhile, Gillian and Eli investigate after an autopsy reveals a firefighter who supposedly died in a fire, was already dead.

The episode was rated 8.00 from 548 votes.

Cal and Zoe attend the execution of a man they helped put on death row. Moments before dying, the murderer claims to be innocent... and Cal believes him. Racked with guilt that he might have sent an innocent man to his death, Cal defies orders from the FBI to stay out of it and goes in search of answers.

The episode was rated 8.00 from 399 votes.

When Cal's old pal, Terry Marsh, comes to town, he brings plenty of trouble with him. Meanwhile, the rest of the team meets with some students from a prep school to determine if any of them are responsible for a threatening tape that was sent to the headmaster.

The episode was rated 8.00 from 448 votes.

A farmer, angry about being foreclosed on, protests by parking his tractor, packed with explosives, right in front of the US Treasury building. Meanwhile, a group of third-graders are brought in by their teacher to find out who stole the class turtle.

The episode was rated 8.03 from 431 votes.

A distraught father comes to Cal for help finding his 18 year old daughter who disappeared and then turned up in a porn movie. Meanwhile, Cal pits Eli and Ria against each other as they vie for the same promotion.

The episode was rated 8.04 from 388 votes.

Cal is hired by the DA to be an expert witness at the trial of a beautiful, young woman charged with murdering her high-powered, and much older, billionaire husband... and Zoe is representing her. Meanwhile,Ria lets Eli in on a little secret.

The episode was rated 8.04 from 402 votes.

While giving a talk to some college students, Cal matches wits with a dangerous sociopath who always seems to be one step ahead of him. Meanwhile, Eli and Ria get the run-around from the government when they look into a UFO sighting.

The episode was rated 8.10 from 434 votes.

Series finale Cal takes a wicked pleasure in wiping the arrogant smirk off the face of a computer entrepreneur who Cal believes murdered one of his partners and framed his other partner in order to gain full ownership of a successful social networking site the three created together.

The episode was rated 8.13 from 400 votes.

Cal and Gillian recruit Ria Torres, a young woman with a natural ability to read people. The DA wants Cal and Gillian to interview a teen, charged with murdering his teacher, before deciding whether to try him as an adult. Meanwhile, Gillian and Ria investigate the Chairman of the House Ethics Committee following rumors that he is paying for sex.

The episode was rated 8.17 from 888 votes.

A copycat rapist has just abducted another woman. FBI Special Agent Ben Reynolds sends Cal undercover to obtain any information he can from Andrew Jenkins, the serial rapist the copycat is emulating. The team races against the clock to uncover the copycat's identity and figure out where he's taken his victim.

The episode was rated 8.29 from 484 votes.