Sumner Redstone, the fierce billionaire who once reigned over Viacom and CBS, has died at 97. The media mogul built a sprawling entertainment empire through the decades, and his headline-making family drama, which included his children battling him for both control of the company and shares of his fortune, is said to be one of the inspirations for the HBO hit show Succession. 

So who was this real-life Logan Roy? From his entrepreneurial beginnings to his many legal battles (with board members, confidantes, girlfriends, and yes, even his children), click through for everything you need to know.

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