NPR's Scott Simon speaks to Joe Keery. Famous for playing Steve Harrington on "Stranger Things," Keery is also a musician and now out with his second album. KUOW is Seattle’s NPR news station.

Between Finn Wolfhard and Maya Hawke and Joe Keery, the Stranger Things cast is quite the musical bunch. Of those, though, the one who has so far had the most mainstream success would have to be ...