Theodore is also in Chapter 5. Once you receive the side mission, "Remotely Helpful", you will be able to travel to the north eastern part of Sunset Hills and take on this Psycho. Well... kind of, you never actually fight Theodore. Instead, you need to destroy the security power boxes that are in the house while you take out his annoying RC helicopters. The helicopters will follow you around and shoot at you while you're trying to take out the power boxes. A good strategy here is to bring a follower and equip them with an assault rifle so that they can deal with the drones while you worry about the power boxes. Once the security system has been dispatched, head to the basement to finish the fight.