When Gabriel’s chip is hacked, he’s shocked to learn that Mei Chen is not only alive, but possesses an even more powerful chip than his own.

Gabriel and Riley pose as Secret Service agents in Syria in order to rescue two American journalists being held hostage. While there, Riley must work with her former boyfriend, and the truth behind their past is revealed.

Gabriel and Riley search for the kidnapped daughter of a senator in Mexico when a Mexican cartel demands he end the sale of U.S. spy satellite in exchange for her safety. Meanwhile, Lillian discovers a connection between the drug cartel and her father.

Gabriel and the Cybercom team head to Texas to help contain an outbreak of a deadly, rapidly spreading virus, but when Gabriel cyber-renders ground zero of the outbreak to isolate who Patient Zero might be, he and the team are shocked to see that the suspect is a criminal believed to have been executed a week earlier.

When Gabriel and Cybercom learn microscopic robots are infecting and killing leading artificial intelligence scientists, they must find who's delivering boxes containing the malicious nanites before Cassidy is the next target.

Gabriel and Riley are sent to Bolivia to protect Javier Leon, a presidential candidate whom they believe is the next target in a string of political assassinations in the country.

Lillian, worried about her daughter's safety, accompanies Gabriel and Riley to San Francisco to investigate a plot to carry out a terrorist attack using blackmailed people in witness protection.

As Riley and Gabriel track an infamous hacker, they learn the suspect may have been set up and a sinister group may be planning a nuclear attack.

Gabriel and Riley must determine who is responsible for framing Gabriel when he is suspected of murder; Tetazoo leads a manhunt for Riley and Gabriel.

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