The sign in the beginning of the episode reading "Pennsylvania", changes to "Transylvania" when the lightning flashes.
This episode was filmed in black and white as an homage to classic 'monster movies'.
Sam introduces the brothers to the sheriff as FBI-agents "Angus" and "Young". Angus Young is the lead guitarist of AC/DC, a band whose music often features throughout the series.
Sam finds Ed Brewer in the Goethe Theatre. Johann Wolfgang von Goethe was a German writer who wrote the famous tragic play Faust which main theme of selling your soul to a demon is reiterated on the show.
The opening credits are presented in the same way that classic black and white film credits were. There is even an Intermission panel complete with closed curtain and soft music playing half way through the episode.