The events in the episode take place on Friday the 13th. This is significant as this episode is also the 13th episode of the series.
First appearance of Billy Drago as the recurring character 'Barbas' AKA 'The Demon of Fear'.
Fans of the series know the demon of fear as 'Barbas' however he isn't referred to as his real name in this episode only as the 'Demon of Fear'.
When Prue enters the shower you can see her ankle tattoo is covered with lighter makeup than her leg.