The murder of two men takes the team to investigate a group of friends that had been sexually assaulted by a teacher at a younger age. Meanwhile, the perfect job opportunity pops up for Charlie and Amita, that may also put a wrinkle on their wedding plans.
The team search for jewels worth millions that were stolen during an awards show. Meanwhile, Don looks into an old case that has been haunting him and Larry returns.
The team hunts down a serial killer who is targeting men who use prostitutes. Meanwhile, Colby and Nikki are involved in a car accident during the investigation.
The team searches for a missing firearms shipment when it seems that one is responsible for a recent death. Don and Charlie both experience relationship troubles.
Don and his team investigate a recent series of thefts involving scratch off lottery tickets only to learn that the robbers are all themselves lottery winners.
After an armored car full of Federal Reserve money becomes the target of a robbery, the team manages to foil the plan and recover the bills. However, the bills have a trail which leads to the infamous D.B. Cooper heist, and the team calls Agent Roger Bloom, who worked on the Cooper heist, for help with the investigation.
Don and the team needs help from convict John Buckley when robbers hit a diamond exchange and take hostages. They believe the robbers are copying Buckley's criminal strategies.
In the middle of a case where he is tracking down a criminal in charge of a heroin ring inside a prison, Agent Ian Edgerton unexpectedly turns into the murder suspect when the informant he meets with winds up dead, sending Edgerton over the edge when he takes a member of Don's team hostage.
In order to find a cyber crime lord, the team conducts an undercover sting. The operation is prevented by a brilliant hacker whose goal is to take over the Internet black market. However, his actions put him in a dangerous online war that might lead to murder.
The team investigates a decommissioned air base after a woman is found dead there, but their investigation is interrupted by paranormal happenings.