Writer:	David Fury
Director:	Daniel Attias
Star:	Emma Caulfield (Anya),  Michelle Trachtenberg (Dawn Summers),  Anthony Stewart Head (Rupert Giles),  Alyson Hannigan (Willow Rosenberg),  Nicholas Brendon (Alexander 'Xander' Harris),  Marc Blucas (Riley Finn),  Sarah Michelle Gellar (Buffy Anne Summers),  James Marsters (Spike)
Recurring Role:	Amber Benson (Tara),  Charlie Weber (Ben),  Clare Kramer (Glory),  Kristine Sutherland (Joyce Summers)
Guest Star:	William Forward (Dr. Isaacs),  Megan Gray (Sandy),  Kevin Weisman (Dreg)

Anthony Stewart Head (Giles) did the "Previously on Buffy the Vampire Slayer" narration. (edit) At the Hellmouth Convention in Belfast in April 2003, Clare Kramer noted how during the filming of the zoo scene (with the snake), the snake escaped and she and Sarah Michelle Gellar were standing on a chair/stool, terrified and refusing to come down until it was recaptured. (edit) The vampire (Sandy) that Riley stakes is the same girl from Season 3 episode "Doppelgangland". In that episode, she was the girl in the Bronze that alternate-dimension-vampire Willow bit as an object lesson. (edit) The round building used in this and later episodes is also seen in the episode of Angel, "Sense & Sensitivity". Half way through, we see the building as the home of the sensitivity trainer. (edit) At the end of this episode when Buffy slays the Snake-Demon in the field, there is a continuous shot panning from Buffy standing over the Snake-Demon's body up to a wide shot of Glory standing in the window waiting for it's return. Later we learn that Glory is holed up in a luxurious apartment, but the wide shot of the building she is in looks a lot more like a house than an apartment. Furthermore, the cliff-side building (and it's surroundings) that we see her in at the end of this episode looks exactly like the shots of the cliff-side house that Anya and Xander live in starting a few episodes from now. Is it the same building? (edit)

Spike: Look, I know for a bleedin' fact the Slayer wouldn't mind me being here.
Riley: Right. What's a little sweater-sniffing between sworn enemies? (edit) Giles: The demon woman was here, the one who attacked you.
Willow: It's no biggie. She just got an amulet and a blood stone.
Anya: That can create a monster.
Willow: Okay, biggie. (edit) Tara: (reading the Magic Box slogan) "Your one-stop spot to shop for all your occult needs." Catchy.
Giles: Think so?
Tara: Uh-huh. In a... hard to read sort of way, but I think it's great. (edit) Giles: (to a customer) Ah, a weeping Buddha: shoulders your spiritual burden. Makes a lovely paperweight, too. (edit) Buffy: How did she get away with this bad mojo stuff?
Anya: Giles sold it to her.
Giles: I- I- I... I didn't know it was her! I mean, how could I? If it's any consolation, I may have overcharged her. (edit)

Buffy becomes inexplicably weak when the snake creature attacks the Magic Box. A small set of shelves is knocked down on her, yet she is unable to crawl out from under it or throw it off even as she watches Dawn being threatened.
Compare this to the episode No Place Like Home, where Buffy falls from the third floor of a building, lands on her back on concrete with someone on top of her, and yet be able to get up immediately without so much as having the air knocked out of her. (edit) The establishing shot of the Sunnydale Zoo shows it to be daytime and open to the public, yet there are no visitors in the reptile house. The building could be closed, meaning that Glory, Dreg and Buffy broke in. If so, it is odd that no one investigates, especially with all the noise and commotion Glory and Buffy are causing. (edit) Although Buffy knew that Glory was attempting to create a serpentine creature it isn't made clear how Buffy knew that Glory would be at the zoo and when she would be there. (edit) Buffy makes no signs having the very painful stab wound she received in the previous episode "Fool for Love". Since this episode picks up immediately after the other, even with her Slayer healing Buffy wouldn't be completely healed. (edit) Buffy and Tara talk about Joyce getting a cat scan but the machine we see her in is an open MRI -- a totally different technology. (edit)

Joyce: They have to do a biopsy to find out exactly what it is.

A biopsy is a medical procedure to extract and examine a tissue sample in order to detect the existence of disease, such as cancer.
(edit) Spike: Not that she doesn't like you ... but sorry Charlie, you're just not dark enough.
The expression "Sorry Charlie" is in reference to the old Starkist Tuna Fish commercials where the animated Charlie Tuna would try to get "caught" by the Starkist fishing boats but would only receive a note at the end of the hook saying "Sorry Charlie". Starkist would only accept the best tuna fish for their product. (edit) Spike: (to Riley) Face it, white bread. Buffy's got a type, and you're not it.
'White bread' is a slang term used to refer to someone who's boring, plain, nondescript, a 'goody-goody', etc. (edit) Xander: (about Riley) Captain America blowed it up real good!
Captain America is a Marvel Comic Books hero who debuted in 1941 and was created by Joe Simon and Jack Kirby.

"Blowed up real good" was the punchline to the Farm Film Celebrity Blow-Up sketch on "SCTV", which depicted two hayseeds on the early morning farm report conducting a talk show. Normally, in this context the term 'blow-up' would refer to an in-depth look at the interviewee's life, but the guests on FFCBU actually exploded. (edit)

Dawn: What is a CAT Scan exactly?
Acronym for Computed Axial Tomography, also known as Computed Tomography Imaging. It's basically an x-ray tube that rotates in a circle around the patient, taking many x-rays of the brain as it rotates. (edit)