[s3e20] Imposter -

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.

Harm's partner who has to handle the trial while suspicious of "Harm's" behavior. Bud Roberts

Alan J. Levi (though some sources credit Kenneth Johnson). [S3E20] Imposter

Details on other throughout the series.

The one who ultimately saves Harm from the booby-trapped apartment. Ronald Vickers Palmer captures Harmon "Harm" Rabb Jr

The recurring antagonist who first appeared in this episode to plague the JAG team. Sarah MacKenzie

Palmer leaves the real Harm bound to a chair in his apartment, which he has booby-trapped with a motion sensor bomb. The bomb is set to detonate if Harm moves or after eight hours. Harm's partner who has to handle the trial

Played both the real Harm and the imposter (Palmer in disguise). Clark Palmer