Gabriel and Riley must rescue the kidnapped member of CyberCom who invented the chip implanted in Gabriel's brain before the top-secret technology falls into the wrong hands.

CyberCom investigates a terrorist suicide bombing at a United States Marine Corps base and learns that new, chemically undetectable bomb material is being consumed.

A CIA agent goes rogue with very important information from the CIA, which results in the death of a M.I 6 agent. When Gabriel is brought to the case they find out that Mei Chen is able to hack into his head.

Gabriel and Riley adopt the guise of Secret Service agents when they travel to war-torn Syria in order to rescue a pair of journalists being held hostage there; Riley's past is revealed when she is forced to work with her former boyfriend.

The daughter of a senator in Mexico is kidnapped by a cartel; Lillian uncovers a connection between her father (Peter Coyote) and the cartel.

Gabriel and the team go to Texas to help contain a deadly, quickly spreading virus and identify patient zero.

While in Bolivia with Riley to protect a presidential candidate from assassination, Gabriel is shocked to learn his best friend is the suspect.

Cybercom is under attack, as an interference with the chip makes Gabriel suffer from amnesia.

Gabriel, Riley, Lillian and the rest of Cybercom try to stop a neurotoxin that could destroy half of San Francisco before it's too late.

Gabriel, Riley and Nelson have to work with a young hacker to destroy a worm before it causes a nuclear incident in Los Angeles.

After being framed by Mei Chen with the murder of the Deputy Director of the FBI, Gabriel has to run against time to prove his innocence.

Riley and Gabriel are shocked when the identities of sleeper agents embedded in the U.S. government are revealed.