A visit from Vecna is a waking nightmare in Hawkins, but it’s a dream come true on Broadway.

“Stranger Things” actor Jamie Campbell Bower surprised fans at Friday’s performance of “Stranger Things: The First Shadow” by reprising his role of Henry Creel in the play’s final scene.

“I’m honored to have been asked to do it,” Campbell Bower told Netflix. “I’ve been so fortunate to see ‘First Shadow’ twice, both in London and when it opened here. It’s both a very bizarre and also beautiful experience to...