Amber on the episode Seeing Red:
“There’d been hints that we were going to have some sort of love scene, but I didn’t really understand what the extent of that was going to be until I went in for a wardrobe fitting and Cynthia, the wardrobe supervisor, said, ‘Now, what kind …

James Marsters had to bleach his hair to play Spike. James swears that putting packets of Sweet and Low in the bleach lessens the stinging on his scalp when he has to dye his hair. His hair is naturally very curly and the bleach also acts as a straightener. He …

In Once More with Feeling, Spike wears a red shirt over his black t-shirt (and under his trademark black coat.) This was the look that he had from his very first episode (season two’s School Hard) until after Something Blue in season four. For some reason, after Something …

In his DVD commentary for Hush, Joss Whedon says how much Buffy’s blue sleeveless top (shown in the first scene) annoys him now, “It didn’t bother me at first,” he says, but he calls it her “Flintstone looking shirt”.

Sarah Michelle Gellar cut her hair in the episode Gone, which caused lots of internet discussion about her new “do”. Personally, I think the show is way above the issue of the length of the lead actress’s hair but there we go (plus, why is it that everytime Anya changes …

The episode Ted was shot during Halloween. Many of the cast and crew came in costume to the set. Kristine Sutherland (Joyce) wore 50s clothes - dressed as Ted’s first wife - and Sarah Michelle Gellar came as Dorothy from The Wizard of Oz, including Toto - her dog, Thor. …

Charisma Carpenter said the following in a BBC interview about Cordelia’s Pylean princess outfit:

“I was scantily clad wasn’t I? And cold. It was tremendously cold. In fact in the last episode [of season two], we’re in Pylea. Groosalug and Angel are fighting and I run to Groosalug’s rescue. He’s fighting …

Some of the Scooby Gang members wore clothes with numbers on them in the episode Bargaining (Part 1). Willow wears ‘11′, Xander wears ‘13′ and Dawn wears ‘7′. In Flooded, Dawn wears shirts with the numbers 2 and 55 on them. Many fans thought they were some kind of cryptic …

In the Bones episode (starring David Boreanaz) called ‘The Man With The Bone’, the Mayor’s wife is wearing what appears to be Vamp Willow’s leather top from Doppelgängland and The Wish. The only difference is there are some ruffles round the cuffs.
A screen capture of this can be found …

The Buffy make up team initially called D’Hoffryn “Mr. Hodgepodge” because he was made by using pieces from The Judge, a demon of Jhe and Pete from Beauty and the Beasts.

Buffy’s wedding dress in the episode The Prom was designed by Vera Wang. In real life Sarah Michelle Gellar’s wedding dress for when she got married to Freddie Prinze Jnr. was also designed by Vera Wang. Buffy’s pink prom dress was designed by Pamela Dennis.

In Buffy vs Dracula, Giles falls into Dracula’s basement, where he is surrounded by the sisters. After he falls he says, “Good show, Giles. At least you didn’t get knocked out for a change.” In A New Man, Giles says he has a “tendency to get knocked on the head”. …

The t-shirt that Oz is wearing at the Bronze in Wild at Heart when Veruca’s band is playing has two Chinese characters which read (in Japanese) as “taihen” meaning ‘terrible’.
On the DVD for the episode, there is a running commentary by Joss Whedon, Marti Noxon, and Seth Green, and …

In Supersymmetry, Gunn is wearing a “Sean John” t-shirt. This is part of the clothing range by rapper Sean “P-Diddy” Combs.

The Gnarl demon suit from Same Time, Same Place was used again in the episode Conversations with Dead People. The costume was painted black and used in the scene where a demon is seen over Joyce’s body.