The Real Bill Gates

⁣The Microsoft co-founder and billionaire philanthropist is asked what his worst fear is. It’s not family tragedy or personal pain. “I don’t want my brain to stop working,” he responds.

That formidable gray matter is fittingly the subject of “Inside Bill’s Brain: Decoding Bill Gates,” a new three-part documentary on Netflix from Academy Award-winning director Davis Guggenheim. It starts Friday.

A portrait emerges of a visionary who gnaws on his eyeglasses’ arms, downs Cokes and is relentlessly optimistic that technology can solve social ills. He also is someone who reads manically — he will scrutinize the Minnesota state budget for fun — and who is a wicked opponent at cards.