[s3e20] - Imposter

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

Played both the real Harm and the imposter (Palmer in disguise). Clark Palmer [S3E20] Imposter

The defendant and the target of Palmer's assassination attempt. Production Credits The recurring antagonist who first appeared in this

Alan J. Levi (though some sources credit Kenneth Johnson). Production Credits Alan J

The real Harm reaches the courtroom just as Palmer (as Harm) is about to expose Vickers to a lethal aerosol nerve gas. A physical fight ensues between the two "Harms" in the hallway, where the real Harm eventually unmasks and subdues Palmer. Key Cast and Characters Significance David James Elliott Harmon Rabb Jr.

Bud Roberts , concerned by Harm’s absence, eventually breaks into Harm’s apartment. A timely power outage fortunately disables the motion sensor, allowing Bud to free Harm just in time.