[s3e20] Imposter May 2026

The episode centers on a plot by , a disgraced and rogue former agent of a shadowy federal agency. Palmer’s objective is to assassinate Lt. Colonel Ronald Vickers , a Marine officer on trial for allegedly violating a chemical weapons treaty by selling biological agents to Algerians.

While Harm is trapped, "Imposter Harm" arrives at the courtroom to prosecute the case alongside Mac (Sarah MacKenzie). Mac is initially confused by Harm's late arrival and strange behavior but continues the trial. [S3E20] Imposter

Amidst the high-stakes thriller plot, the episode features a significant character milestone: Bud finally proposes to Harriet Sims with a piece of jewelry. The episode centers on a plot by ,

The one who ultimately saves Harm from the booby-trapped apartment. Ronald Vickers [S3E20] Imposter