Stranger Things Is Getting New Cast Members For Season 4 — Get the Full Rundown

Every season of Stranger Things introduces some new authority and government figures, and this season, it's Lt. Colonel Sullivan, an intelligent and no-nonsense officer who believes he knows how to put an end to the evil in Hawkins. Augustus has had a three-decade career on screen, but you probably know him best as Marshall Pruitt from Westworld or Nathaniel Moon on Into the Badlands.