The lights that appear on the transmitter that Donald has flashes the lights green, green, green , red. The same as in The Equation and what we know as the light sequence to hypnotize.
The amusement park shown at the end of the episode is Playland, in Vancouver, BC. The roller coaster is simply known as the Wooden Roller Coaster, built in 1958.
The same 'green green green red' sequence seen in many episodes is shown onscreen when August is looking through his "binoculars."
The glyphs for this episode spell out: BLIGHT
Much of the action in this episode takes place at the Belle Motel in Lowell, Massachusetts. Lowell, a city of over 100,000 inhabitants and the fourth most populous city in Massachusetts, has no motels (in real life).