The four-hour-long Elon Musk documentary might be preaching to the choir

It makes sense that Musk is a long film. The latest from Alex Gibney, who has previously directed documentaries about Theranos and Steve Jobs , is an impressively thorough retelling of the story of Elon Musk, from his early days as a dot-com millionaire to " taking a wood chipper " to vital US government departments. In order to understand Musk's rise to power, you need to know the whole story.