Don and his team search for the people responsible for the deaths of two rock climbers who had a large diamond in their possession. Meanwhile, Charlie debates getting his FBI clearance reinstated as a new agent joins the team.

Don investigates when someone is murdered at an ATM after a series of kidnappings had occurred there. Charlie meets with an FBI investigator who can grant or deny him a security clearance within the bureau.

When eight people, including two police officers, are executed in a coffee shop, an LAPD detective gets the team on the case, and they uncover a trail of blackmail, romance and corruption. Also, McGowan's investigation of Charlie and Don deepens.

Don and his team are called in to help a veteran FBI agent track down a con man who has eluded him for years. Also, Agent McGowan hands down his decision on Charlie's security clearance and Don's future with the FBI.

When a shipping service discovers they are missing high-end goods the team hunts down the crew responsible and ask an employee with savant-like abilities to help them find who is behind the crime. Also, Don questions his faith in the FBI after one of his men is killed while on duty.

When a female magician disappears on stage during a trick and doesn’t reappear, Don is sent in to investigate. David was in the audience and witnessed to act.

Don & Charlie investigate when a family friend who was a park ranger and a former professional surfer is found murdered. Although the death was ruled an accident, the guys probe links this crime with another.

When a passenger train and a freight train carrying toxic chemicals collide, Don, Charlie and the rest of the team must determine if foul play was involved in the crash.

The bombing of a charity headquarters sends the team down a trail of rumors in order to get to the bottom of who is behind the attack.

When a vigilante goes after a known criminal, Charlie has to go to his rival for help. Meanwhile, Don debates his choice to embrace religion.

A teen killer who was sent to prison by Don, after embarking on a cross-country killing spree along with his 30 year old Texas schoolteacher, has escaped and is bent on revenge. Don hopes his newly found religious beliefs will help him through this dangerous situation.

A bus full of Hollywood tourists are taken hostage and the team is given just four hours to meet the hijackers demands.

After a fight breaks out between rival Chinese gangs within the black market, an undercover FBI is kidnapped. Psychic Samuel Kraft lends his help to the case.

The team enters the world of sneaker collectors after a foreign ambassador's vault is broken into and a limited edition pair of sneakers is found missing.Thieves have broken into the private residence of a foreign ambassador, and a pair of limited edition sneakers have been stolen which he paid over $250,000 at an auction.

When an accused drug smuggler gets acquitted despite strong evidence saying guilty, leads Don and his crew into a case for possible jury tampering.

In order to stop the introduction of a new drug to the streets, Charlie comes up with a plan that will put Liz in the line of fire.

When a super computer is to blame for the death of a scientist, the team goes to new lengths to solve the case. Meanwhile, Charlie contemplates a job offer.

The team is in a race against time to look into a last minute tip that would clear a mob boss on the night of his execution. Meanwhile, Charlie tries to help the CalSci basketball team break their losing streak.

The investigation of a CalSci professor's death uncovers a possible link to a radical animal rights organization.

Charlie is used for his math skills to help profile the suspects of home invasions which the FBI has been called in to investigate. But his calculations go awry following a raid, causing Don to suffer a life-threatening injury.

Feeling guilty over the stabbing, Charlie puts his attention on finding a serial killer using math theories to help the team solve the case before another life is taken.

Don and the team are sent to look into a series of bank robberies and soon name former FBI Agent Roger Bloom as their lead suspect.

When Amita is abducted, Don and the teama 's frantic search for her leads them to the delusional head of a cult, but it is up to a distraught Charlie to discover what the suspecta 's bizarre plans for her are.