[s3e21] Treason Heartbreak Gum (2025)

He converts a bicycle into a powerful winch to pull heavy security bars off a window.

To save Ethan’s family, MacGyver and the team must infiltrate a secure building. Mac uses a gum wrapper to create a makeshift electrical switch and a bicycle-based hand-crank winch to break window bars. Key Character Moments [S3E21] Treason Heartbreak Gum

Her breakup with Billy marks a significant shift in her character arc, ending a long-running romantic subplot. Notable MacGyverisms He converts a bicycle into a powerful winch

Mac uses the foil from gum wrappers to complete a circuit, using the gum itself as an insulator until it's pulled out to trigger a spark gap. Key Character Moments Her breakup with Billy marks

Matty Webber’s ex-husband, Ethan Reigns, resurfaces to ask for her help. A criminal organization led by August Roth has kidnapped Ethan’s new wife and daughter. They demand the CIA’s NOC list (Non-Official Cover list) in exchange for their lives. Matty faces a moral dilemma: commit treason by stealing CIA secrets or let her ex-husband's family perish.

To move down an elevator shaft safely, Mac builds a friction-based descender device to control his fall.

Although he survives the ordeal, Ethan is ultimately taken to prison for his role in the treasonous attempt.