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. Meanwhile, Gabriel takes advantage of his chip to search for his wife who disappeared years ago.
CyberCom investigates a terrorist suicide bombing at a U.S. Marine base and learns a new, chemically undetectable bomb material is being consumed. Meanwhile, Riley is forced to make a drastic decision when she finds Gabriel unable to complete a task
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.