This is the first episode in which the sisters use a vanquishing potion to kill a demon.
The first episode where Prue channelled Telekinesis through her hands.
The full expression used in the title is "out of sight, out of mind."
Josh, Piper's sort-of-boyfriend, leaves to take a job in Beverly Hills, CA. Shannen Doherty was the star of the first 4 seasons of "Beverly Hills 90210."