Lost in Space (1965)

S2E11 West of Mars

Dr. Smith encounters a doppelgänger named Zeno, who is fleeing from the authorities. Zeno forces Smith to swap identities, and in a panic, Smith admits to Zeno's offenses. As a result, he is taken into custody along with Will, both set to face a judge. The question looms: will the real Zeno be apprehended before Dr. Smith faces a dire fate in the boiling oil?