Lethal Weapon Designed to Leave No Trace (S2) | Secrets Declassified with David Duchovny

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Published Jun 19, 2026

In 1957 West Germany, a covert plot unfolds as operatives develop a lethal mist designed to eliminate a target without leaving a trace, risking escalation during the Cold War. See more in Season 2, Episode 5, "Bizarre Weapons."

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From black ops and bizarre experiments to deadly cover-ups and nefarious gadgets, David Duchovny pulls the curtain back on all the government secrets in modern history we always suspected, but were never given the answers to. Through the strange and shocking things countries the world over - and those who work for them - have done in the name of national interest, we'll investigate the explosive evidence from newly declassified files that will finally shine a new light on what's really going on deep in the shadows.

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