Using a fish scaler and some fishing wire, Mac and Jack must track down a corrupt FBI agent who has framed a man for murder. Also, everyone on the team is terrified to get their first performance review from Matty, their tough new boss.

MacGyver, Leanna, Riley and Bozer pose as honeymoon couples at a resort in order to gain information about a Serbian war criminal from his newly married son. Also, Bozer wonders if Matty knows about his relationship with Leanna, and Jack recruits Elwood to help him break into Matty’s home.

When Oversight’s attempt to capture a drug cartel’s leader goes bad, MacGyver and Jack rush to Mexico to pull their boss out while racing through the heart of the country during Dia de Muertos celebrations. Also, Bozer and Riley use Halloween as a distraction to gather intel on a man accused of treason.

As MacGyver works quickly to rescue survivors from a collapsed building in Germany, he discovers a new safety threat – a 1,000-pound undetonated bomb from World War II hidden beneath the rubble.