When Spike moves into Xander's apartment earlier in the season, Xander says "I know it looks like a closet, but it's a room now", insinuating that he's made a "room" for Spike in a closet. But in this episode, when Anya is snooping, we see that Spike's "room" has its own closet and is fairly large -- it even has a separate door to the bathroom.
Everyone in the Bronze sees a vamp being dusted in front of them, pauses for a moment, then continues as normal. This shows how just about everyone in Sunnydale is now aware of the existence of Vamps (well at least those that frequent the Bronze).
In this episode we find out that Billy Idol stole his image from Spike (or at least that Buffy believes this to be true).
When Anya is on top of Spike saying "take me now", Spike's head is leaning back and Anya's arms are free. The camera pulls back and Spike's head is now upright and his hands are holding both of Anya's upper arms.
While Anya is trying to convince Spike that the real reason she is in his bedroom is for sex, Spike keeps moving up toward the head of the bed away from her clutching the blue top sheet around himself. The sheet becomes bunched up around Spike's waist area. However, in the next shot as Anya gets up on the bed with Spike we see his legs fully extended underneath her and the sheet flatly in place covering the bottom of the bed up to his torso.
In the late afternoon, Anya's curiosity and boredom get the better of her. She rises from the couch, walks towards Spike's closed bedroom door, hesitates for a moment in front of it, and then walks into Spike's room to search for clues. Standing in front of the closed door, she has no weapon having left the stake on the coffee table. Yet when she is shown walking through the doorway moments later, she holds the stake in her right hand.
Near the beginning, when Buffy calls in at Xander's apartment looking for Spike after being told he Sired Holden Webster, you can see the shadow of someone's face on the wall behind Xander when he's telling Buffy he doesn't know where Spike is and that Spike's a creature of the night. It can't be Buffy's or Xander's, so it's most likely a member of the crew.
How did all the vampires just manage to rise at the exact same time considering they were Sired over the period of several days?
In the last episode, Spike kills a blond woman. Then buries her in the basement. However when all the vampires rise, the blond woman is no where in sight.
This might be because Spike only killed her, but didn't take the necessary ritual steps to sire her.
Bouncer: Hey, Sweetheart. If you wanna go in, go ahead.
Buffy: Actually, I need some help. I'm looking for this guy. Bleach-blond hair, leather jacket, British Accent. Kind of sallow, but in a hot way?
Bouncer: Yeah, yeah, I know the guy. Billy Idol wannabe.
Buffy: Actually, Billy Idol stole his look from... never mind. Has he been here?
Anya: Soulless Spike would have had me upside down and halfway to happyland by now.
Spike: As daft a notion as soulful Spike the killer is, it is nothing compared to the idea that another girl could mean anything to me. This chip, they did to me. I couldn't help it. The soul I got on my own. For you
Spike: (After Buffy insinuates Spike is killing again.) You know I can't.
Buffy: Right. The Chip.
Spike: No, not the chip. Not the chip dammit. You honestly think I'd go to the end of the underworld and back to get my soul and then-- Buffy, I can barely live with what I did. It haunts me. All of it. If you think that I would add to the body count now, you're crazy.
Anya: It's not like I'm snooping around for proof that you're some sort of whacked-out serial killer. I don't know why I said that. Forget I said that. It's craziness talking, it's just nerves. Nerves. Nerves and horniness. Oh, just shut up, William, and take me. Take me now.
Spike: God help me Buffy, it's still all about you...
Aimee Mann: Man, I hate playing vampire towns.
Anya: I used to tell the truth all the time when I was evil.
Anya: I'm here for ... sex!
Female Vamp: Was that all I was to you? A one bite stand?
Anya: If I get vamped, I'm gonna bite your ass!
Xander: (mumbles) Wouldn't be the first time.
Anya: What was that?
Aimee Mann is the only musical guest star to ever have any lines of dialog in the series.
In the scene where Anya "babysits" Spike, the outline of a bunny can be seen on her top.
In the Bronze - "Pavlov's Bell" and
"This Is How It Goes" both by Aimee Mann
SLAYER or SLAYEE? London, England
Aimee Mann's song: Pavlov's bell
The title of the song refers to the famed experiment by Ivan Pavlov. Pavlov would ring a bell whenever he served his dogs food; eventually, the dogs associated the bell's sound with food and would salivate whenever they heard it, whether food was present or not. An appropriate reference, as Spike's behavior was also triggered by a sound.
The title Sleeper is in reference to the military term sleeper which is a person who performs subterfuge, causing trouble from within the enemies ranks. The sleeper is usually one who is trusted (or at least has access or authorization). Sometimes sleepers are brainwashed or programmed and are thus unaware of their mission; with the saboteur personality lying dormant until triggered, often verbally.
The Bouncer: Yeah I know the guy, Billy Idol wannabe
Billy Idol is a 80s British punk artist who wears leather and has bleached blond hair. The bouncer was saying that Spike was copying Billy Idol's image, but in fact Buffy says that Billy Idol got his look from Spike (the flash back of Spike fighting the slayer in the NY tube train looks very like Billy Idol).
Spike: Early one morning...
The tune that Spike sings as his trigger is an old folk song called "Early one Morning". The lyrics are fairly relevant to Spike's situation (apart from the fact that they are written from a female point of view).
Xander: Cool as Cool Whip.
Cool Whip is ready to use whipped topping which has many uses. Cool whip is a non-dairy substance made from tropical oils, sugar and stabilizers. It can be substituted for an equal amount of whipped cream.
Xander: Okay, let's look at this objectively. Figure it out in a cold, impersonal, CSI-like manner 'cause we're a couple of carpet fibers away from a case.
CSI or Crime Scene Investigation is a popular drama that began airing on CBS in October of 2000. The show mainly revolves around the examination of forensic evidence, with investigators often using incredibly small bits of evidence (such as carpet fibers) to solve crimes.
Buffy: The Oscar goes to...
"Oscar" is the nickname of the statue given as the award for the Academy of Motion Picture Arts and Sciences.