Plot hole: When Angel comes back to the doctor's home with food, he opens the bedroom door and turns on the light in that room. The lights are already on outside this room when we see him turn the doorknob. When Angel leaves, he leaves the light on in the bedroom and heads downstairs. Just before leaving out the front door, he turns off the light switch nearby. The shots changes to show the doc's body and the room going dark- as if Angel is still in the bedroom and turned off that light.