The trailer for the new Picard show poses an intriguing question. What would prompt The Next Generation's captain to abandon his crew?

He was one of the greatest starship captains the galaxy has ever known, a shining beacon of intelligence, tolerance and empathy who made baldness look badass. So why did Jean-Luc Picard leave Starfleet?

That's the question posed by the trailer for Star Trek: Picard, a new show that picks up the good captain's adventures years after we last saw Patrick Stewart take command of the USS Enterprise. It's been exactly 25 years since Star Trek: The Next Generation ended, and nearly two decades since the last Star Trek movie with the TNG crew. The new trailer suggests Picard's career culminated in his leadership of a huge armada of starships. But then he quit.