Mac's meeting with Desi's parents goes sideways when her brother finds himself in trouble and desperately needs their help. Russ and Matty must ask an old nemesis for assistance when their new recruitment candidate is kidnapped.
During COVID-19's first stay-at-home order, as Mac, Bozer and Riley quarantine together, they try to stop a crime in progress at their neighbor's house.
The secret experimental cancer treatment Mac's developing with a friend is discovered when culprits ransack their lab, kidnap Mac's partner and plan to use the research to create a powerful new nerve agent.
Mac and team rush to help when Matty's former mentor, Ian Cain, and his embassy staff come down with a deadly, mysterious illness. Also, Taylor and Bozer work with Jerry Ortega.
When Mac and the team are unable to prevent Department of Defense intel from falling into Codex's hands, Mac must scale a vertical cliff using only gear he can cobble together himself to prevent the info's transmission
When Mac and Riley go missing and wake up 24 hours later in a corn field with no memory of how they got there, they must unravel the mystery to find who took them, and how to get rid of the nanotrackers in their bodies, no matter the cost,