Rock Reiser, who played the desk sergeant at the Police Station in Dead Things, has also appeared in Never Been Kissed, Letters from a Killer, Charmed, ER, Melrose Place and Northern Exposure.

Joss Whedon said at “Behind the Scenes of Buffy the Vampire Slayer” at the Academy of Television Arts & Sciences in June 2002 that Doublemeat Palace was unpopular with Buffy sponsors who felt it was making fun of their businesses. Some sponsors even pulled out of the show because of …

In Doublemeat Palace, Xander says, “I thought Jonathan completely learned that lesson”. He’s referring to the events of Superstar, in which Jonathan created a spell to be everyone’s ideal. The spell went horribly wrong.

In Doublemeat Palace, Buffy mentions she has waitressed before in an L.A diner with lots of people who didn’t tip. This is a reference to season three’s opening episode Anne, where Buffy ran away briefly to L.A.

Kirsten Nelson played Buffy’s boss and manager Lorraine Ross in Doublemeat Palace and Normal Again. She has been in The O’Keefes (as Ellie O’Keefe), Baby’s Day Out, The Fugitive, Frasier, Ally McBeal, The West Wing, Just Shoot Me and Boy Meets World.

In Gone, Buffy namechecks invisible girl Marcie Ross from Out of Mind, Out of Sight:

Xander: “Buffy, how did this hap– wait a sec. Have you been feeling ignored lately?”
Buffy: “Yeah, ignored. I wish. No, this isn’t a Marcie deal.”

After making social worker Doris Kroeger look crazy in Gone, Buffy whistles part of her song ‘Going Through the Motions’ from Once More, With Feeling. She whistles “I can’t even see, if this is really me” - a fitting choice for the episode.

In Flooded, Andrew says, “I had nothing to do with the devil dogs. I trained flying demon monkeys to attack the school play. School play, dude!” In Gone, he tells Buffy, “I summoned the flying monkeys that attacked the high school.”

Willow tells Amy in Smashed that Larry was gay (discovered in Phases) and that he died in the attack by the Mayor in the season three finale Graduation Day (Part 2). Larry’s death was never explicitly stated before this episode.

Xander mentions Buffy’s “exploding lint” from Life Serial in the episode Smashed.

In Smashed, Amy watches an ad on TV for the fast food restaurant Doublemeat Palace (”Now you get two Doublemeat Medleys for the price of one!”). Buffy ends up working at the Doublemeat Palace three episodes later.

In Smashed, Willow tells Amy she can provide a forgetting spell “only, you might wanna sew your name into your clothes first”. She’s referring to the events of Tabula Rasa when her spell caused the Scoobies to forget their memories.

In Doppelgängland, Faith says about Wesley, “Princess Margaret here had a little trouble keeping up.” Princess Margaret was the younger sister of Queen Elizabeth II. She was born in 1930 and died in 2002, after bad health problems including a stroke, a heart attack, and lung surgery.

Buffy was the nickname of Queen Elizabeth II’s mother, also named Elizabeth. The “Queen Mother” as she was known, died in March 2002. Buffy is a common nickname for those with the full name Elizabeth.

“Buffy” is also the name of a gene, first isolated in Drosophila (fruit flies), and its corresponding protein. What the protein does is save the cell if it’s been instructed to die.