Watch 3rd Rock from the Sun Online: 3x5

Dick goes for a medical checkup but becomes scared and leaves before his appointment. Mary asks Sally and Tommy to house sit for her on Halloween, to stop trick-or-treaters (Emile Hirsch) egging her home while she is out. Harry, however, chooses to stay at home, where he encounters some very strange noises and starts to believe that there is a ghost in the house.