Played both the real Harm and the imposter (Palmer in disguise). Clark Palmer
Alan J. Levi (though some sources credit Kenneth Johnson). [S3E20] Imposter
Where to the episode on platforms like Paramount+ or Amazon Prime Video. "JAG" Imposter (TV Episode 1998) - IMDb Played both the real Harm and the imposter
The one who ultimately saves Harm from the booby-trapped apartment. Ronald Vickers Where to the episode on platforms like Paramount+
Admiral Chegwidden becomes suspicious and tests the imposter by asking about a fictional case, which Palmer-as-Harm fails to recognize as fake.
" Imposter " is the 20th episode of the third season of the military legal drama , which first aired on April 21, 1998. It is widely remembered for its high-stakes plot involving a literal imposter attempting to commit an assassination in a courtroom under the guise of the series protagonist. Plot Summary
Palmer captures Harmon "Harm" Rabb Jr. at his apartment on the morning of the trial. He incapacitates Harm and uses a sophisticated process to create a life-like mask of Harm’s face, effectively assuming his identity.