It's back! These are the things you absolutely have to remember before you see director Andy Muschietti's It Chapter Two. It's been two years since the first film came out and we all remembered how terrifying Pennywise the Clown is, so before you dive back into the haunted world of Derry, join WatchMojo as we count down the essentials from the book and previous film, from the Losers' Club Blood Oath, to what happened to Henry, to Maturin the Turtle.