Actor Dan Butler was terrified of the snake, being unable to talk while shooting the scene in the basement. The actor's fright meant the make-up team did not need to apply fake sweat to his face.
First directorial effort on the series for Kim Manners. He would go on to direct another 50 episodes, the most prolific director in the series' history.
The snake going down the stairs proved difficult to film as the animal kept on falling onto the floor after slithering down the steps.
Those are real toads falling from the sky at the start of the episode. Originally the plan was to use rubber ones but they bounced so much off the stars' umbrellas that it became farcical.
The name of the high school is Crowley High School. This is a reference to Aleister Crowley, the well-known turn of the century occultist, and performer of "black magic".