Michael Chieffo

The team investigate bank robberies where victims were forced to undress during the ordeal. The robber's behaviour begins to escalate from the search for profit to the abuse of captives.

A dead body is found clutching a 300-year-old finger bone, with the investigation leading Brennan and Booth into an underwater mystery.

Bosco and his agents are gunned down within the walls of CBI headquarters. With two men dead and Bosco in a critical condition, Lisbon and her team race to find the perpetrator. As the investigation progresses, it becomes clear that notorious serial killer Red John is responsible - and he has an assistant inside the department.

The team investigates a biker killed in a hit-and-run; Gibbs prepares to testify against a financial adviser who stole millions from his Navy clients.

Bartlet must deal with the possibility of a nuclear explosion in California, Kate is keeping a careful watch on the election in Kazakhstan, and China's response, while Josh is trying to keep his political version of Tourette's in check.

Catherine reopens the case of a death-row inmate after new DNA evidence surfaces; the body of a murdered college student is found in a trash bag.