The team races to find a group of kidnappers who have their victims drain their bank accounts using ATMs, and Charlie's attempt to reinstate his clearance is slowed by an agent with an agenda that may include Don.
Charlie and Don's fates hang in the balance as the team tracks a white-collar criminal through Los Angeles. Meanwhile, Alan finds out that one of his old planning projects may disappear with a new development by the city.
The death of an agent kicks everyone into high gear, but that slows down when their prime suspect turns out to have Autism Spectrum Disorder, Charlie steps on toes re-establishing himself as the resident expert, and Don looks for deeper meaning.
The abduction of an undercover agent brings ex-CIA psychic Simon Kraft back into the Eppes' lives, and while Charlie pursues a scientific solution and Don a procedural one, Kraft's visions lead them toward an ancient ceremony and the loss of another life.
When Robin Brooks loses a case involving the murder of an informant, the team takes it very personally. Launching an investigation to get around double jeopardy, and bring justice down on an international arms dealer.
An old friend who's a DEA agent agrees to assist Liz in an undercover operation when Charlie uses math to affect the city's drug traffic, but a miscalculation and an addiction endangers both her life and the operation.
Charlie is distracted from applying math to his first basketball-coaching job when a doctor claims to have evidence that clears a death-row inmate, leaving him and the team very little time to be sure real justice occurs.
Charlie takes a very personal interest when one of CalSci's professors is murdered during a raid by animal rights advocates, and once the murderer is found Nikki's actions put the operation and civilians at risk.