Invisible Siege: The Moscow Signal

For over two decades, the U.S. Embassy in Moscow was bathed in a microwave beam. No public warning was ever issued. The diplomats inside never knew why they were getting sick.

This episode of Unsettled: The Hidden Record uncovers the Cold War enigma known as The Moscow Signal—a mysterious low-level microwave transmission aimed directly at the U.S. diplomatic compound by Soviet authorities. The signal's purpose was never fully confirmed: Was it for espionage? Crowd control? Biological disruption?

The U.S. quietly installed shielding. Health reports were compiled in secret. And only years later would whispers of cancer clusters, strange illnesses, and psychological symptoms reach the surface.

This is the story of an invisible war waged with frequencies—of a signal that couldn’t be heard, but may have left lasting damage.