What was the first show filmed with a live studio audience?

The answer is: I Love Lucy

In 1951, Lucy and Desi were ready to tell CBS to shove it when the network said filming "I Love Lucy" with a live audience couldn't work. The suits wanted them to use a laugh track like every other show, but Desi knew from his nightclub days that performers feed off real audience energy.

They mortgaged their house and started their own production company, Desilu, betting everything on the idea that comedy works better when actual humans laugh at it.

The technical challenges seemed impossible. Nobody had ever run multiple cameras simultaneously to catch all the action. They brought in Karl Freund, a cinematographer who'd shot actual Dracula movies. He created a three-camera setup to capture everything from Lucy's famous cry face to her physical comedy gold.

Network executives panicked about every possible problem. Coughing? Chair squeaks? Inappropriate yelling? Lucy and Desi understood these "problems" made shows better. Real laughter spreads like wildfire. When Lucy stuffed chocolates in her mouth or got progressively drunker on Vitameatavegamin, those howls of delight came from real people losing their minds.

The suits learned their lesson: never bet against Lucy. And every multi-camera sitcom since can thank Lucy and Desi for refusing to settle for fake laughs. They all followed the blueprint of two performers who knew power of genuine human reactions.