As anyone who's seen a period piece knows, the secret to getting the era right lies in the details. However, as anyone who's worked on a film or television set before knows, making sure of the details can be a monumental task. After all, there exists a position on most production crews where someone just watches the sets, props, and dialogue for internal continuity, never mind for historical aspects. Netflix's "Stranger Things" is a show where its chosen period of 1980s America acts like a character unto itself, but it's certainly far from the only defining element. The series also juggles such unwieldy concepts like teen melodrama, adult angst, shady government conspiracies, creepy crawlies from another dimension, telekinetically powered human beings, and Dungeons & Dragons lore, so there's a lot for any given writer, actor, director, or continuity person to keep an eye on. Fortunately, the show has its own secret weapon: Winona Ryder, a leading a