This episode scored a 5.1/8 in the ratings.
This episode ranked 5th out of 15 WB shows for the week.
This episode scored a 3.6 in the fast nationals.
Ranked 95 out of 112 prime time shows.
This episode reveals that Slayers and vampires are vulnerable to ghostly possession.
Davis Boreanaz's performance as Angel possessed by the spirit of Grace Newman was what convinced Joss Whedon that he could carry his own show.
This episode marks the first reference to the Mayor of Sunnydale (Richard Wilkins).
When the yearbook falls off the shelf, it's open, but is closed when Buffy picks it up.
At the beginning of the scene where Buffy and Xander go to his locker, a reflection of the boom mike can be seen in the door window.
When everyone turns to the wasp-infested school to try and get Buffy out, an establishing shot of them looking at the school is clearly lifted from an earlier scene, as you can see Buffy standing in front of Giles, between he and Willow.
The Flamingos recording of "I Only Have Eyes For You" was released in 1959, four years after the setting of the ghost story.
The title of this episode is named after the song of the same name. The song was originally written in 1934. It has been recorded several times, by the best known as the version by the group The Flamingos in 1959, which is the version used in the episode.