Trivia: In a very geeky milestone, this episode features the first use of the verb "Googled" to refer to an internet search on a scripted American television show. In the twenty years that have passed since this episode aired, saying "Googled" to refer to an internet search has become so common, over 80% of people polled use it regularly.
Trivia: In the final episode when Buffy, Xander, and Willow are wandering off talking about shopping, Giles turns round and says "The Earth is definitely doomed!" This is a little tribute to the end of the episode 'The Harvest' when Buffy, Xander and Willow wander off talking nonsense and Giles turns round and says a similar thing.
Trivia: There have been several lines throughout the series have referred to Tuesday ('There's a demon trying to destroy the world and it's just another Tuesday night in Sunnydale' in Revelations and 'Dawn's in trouble. Must be Tuesday' in Once More With Feeling). These are references to the fact that, in the USA, Buffy is aired on a Tuesday.
Trivia: In season 5 'The Body', the one where Joyce dies, there is no music throughout the entire episode. This episode is also the first time we see Willow and Tara kiss, Joss decided that the kiss should happen very matter of factly, without a big dramatic lead up to it.
Trivia: This is the only episode to feature the lead actors from all four of Joss Whedon's Mutant Enemy productions: Sarah Michelle Gellar (obviously), David Boreanaz guest starred as Angel, Nathan Fillion (from "Firefly") played Caleb, while Eliza Dushku, who played Faith, was the lead on "Dollhouse".
Trivia: The 'Grrr Arrrg' monster at the end of each episode (ie. the mascot for Mutant Enemy Inc.) is something that alot of people watch through the credits to see. But if you watch at the end of 'Becoming', he walks past and says 'Boo hoo, I need a hug'...and at the end of 'Once More With Feeling' he sings his 'Grrr Arrrg'...and in the Episode 'Bargaining Pt. 1' Tara gives Giles a small monster as a goodbye present, 'Something to remind you of Sunnydale...' and then goes 'Grrr Arrrg'....Ain't little monster's grand. Also at the end of the Christmas episode where Angel tries to kill himself, the monster is wearing a santa hat, and, at the end of the graduation episode, the monster is wearing a mortar board.
Trivia: In the Buffy episode 'Anne' we are re-introduced to a character played by Julia Lee. Called Lily in this episode, she was previously called Chanterell in the season 2 ep 'Lie To Me'. At the end of the episode, Lily asks Buffy if she can be 'Anne', Buffy's L.A. persona, to which Buffy replies yes. It is interesting to note that Julia Lee returns later in several season 2 'Angel' episodes as Anne, though by now she has grown up significantly and is now running a hostel for runaway youth, something she once was...