Cory Scott Allen

Angus "Mac" MacGyver (Lucas Till) and Jack Dalton (George Eads), special agents for the Department of External Services (DXS), join forces to recover a missing bioweapon that has the ability to destroy hundreds of thousands of people with one single drop.

When the decapitated body of a woman found in Lake Michigan is connected to Voight's (Jason Beghe) social circle, Lindsay (Sophia Bush) fears his relationship with the group may hinder his ability to approach the case objectively. Roman (Brian Geraghty) is having a hard time coping with recent events and an error in judgment causes him to make a grave mistake. Meanwhile, Olinsky (Elias Koteas) becomes upset when Antonio (Jon Seda) doesn't consultant him before making a decision that could affect Michelle's (guest star Madison McLaughlin) future.

Rayna seeks the help of a music producer to change her sound; Juliette goes on a date with an NFL player in an attempt to repair her image; Lamar's plan to delay Coleman's arrival at a photo op works too well.

Rayna is comforted by an old friend after telling Maddie and Daphne about her plans to divorce; Juliette reinvents herself; Avery considers an attractive offer.

As Mac and the team investigate the suspicious death of Dawn’s (Amy Smart) CIA supervisor, the evidence leads to a dirty CIA agent and a massive counterfeiting ring. Amy Smart returns as Dawn, who is now working for the CIA.