Airwolf

Season 1, Episode 5: Proof Through the Night

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A Russian mole discovers that scientists in the U.S.S.R. have developed a lethal serum that instantly kills anyone exposed to it. He steals a vial of the serum and contacts his friend Archangel for help in escaping the country with his family. Archangel dispatches Hawke and Santini for the rescue effort, but Airwolf can't handle that much passenger weight -- unless all her armaments are stripped leaving the supercopter defenseless.