Admiral Chegwidden becomes suspicious and tests the imposter by asking about a fictional case, which Palmer-as-Harm fails to recognize as fake.
Where to the episode on platforms like Paramount+ or Amazon Prime Video. "JAG" Imposter (TV Episode 1998) - IMDb [S3E20] Imposter
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. Admiral Chegwidden becomes suspicious and tests the imposter
Played both the real Harm and the imposter (Palmer in disguise). Clark Palmer The bomb is set to detonate if Harm
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.