Insidious: Chapter 2 hits all the marks of a good horror sequel. It serves up a terrifyingly good time; it avoids simply retreading old territory; and it even expands on the original's mythos. And it does so with maniacal glee. Its deceptively plain title is surprisingly apt because it genuinely feels like a necessary continuation of the story and not some tacked-on cash-in, as horror sequels often are. You may think you know all there is to know about the world of Insidious from Chapter 1, but Chapter 2 still manages to squeeze some surprises out of the lore. Ultimately, Chapter 2 effectively binds the two films together as one intriguing tale. Whether you're familiar with Chapter 1 or not, Chapter 2 is worth a watch.