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Stream the full The Secret Genius of Modern Life Season 3 Episode 4 movie online for free in crystal-clear HD quality. No downloads required—just press play and enjoy the action, complete with English subtitles for an enhanced viewing experience.

The rise of the smart doorbell is one of the great tech success stories of the 21st century, and these security gadgets are now taking over people's doorsteps.Hannah heads to Los Angeles to talk to market leaders Ring and take a deep dive into doorbell history, discovering how a garage tinkerer who played with sharks, some Soviet spy tech and a student desperate for a drink all led to this technological phenomenon.