In 1991, director Steven M. Martin traveled to Moscow, found Léon Theremin, and bought him back to the United States for the first time since 1938.
The Theremin is played without being touched; it was the first and is still the only non-contact instrument.
In addition to being the inventor of the musical instrument that bears his name, Léon Theremin was also the inventor of the eavesdropping electronic-bugging device.