In “Stardust,” we find David Bowie (Johnny Flynn) on the rise but frustrated. He’s broken out with “Space Oddity,” but now what? He’s too niche to be considered mainstream, but still he wants to achieve that rock star status. So, he crosses the pond to meet an enthusiastic publicist, Ron Oberman (Marc Maron), for a tour. Only when Bowie arrives, he learns he can’t actually play in the States, not legally anyway. So, he’s booked a series of private concerts, at which Oberman will try to talk him up to the right people. Along the way, Oberman tries to navigate their way through the thornier sides of the music industry and America.