You can always tell when Halloween is on the horizon, because every streaming service stocks up on horror films until October 31. Thanks to some impeccable timing, two of this year's biggest horror hits are now streaming. Watch With Us selected both of those films when narrowing down our picks for the three great horror movies to watch on Hulu, Netflix and HBO Max in October. Our picks include a harrowing occult tale, a long-awaited sequel to a definitive zombie hit and the debut movie of the director behind Weapons.