The set used in this episode for the science lab is the same set used for Fred's Lab in the new Wolfram and Hart in Season 5.
When Lorne (The Host) is reading a book in the library, he's standing in a section marked "Mystery", and you can see what looks like a mystery novel on the shelf. The book he picks up, however, is a Russian-English dictionary. It's not impossible for something to be misfiled, of course, but it does seem a little unlikely.
The man pouring beer when the time-stop bubble is expanding-- When time stops, there is a little beer in the bottom of the glass. When the bubble retracts, there is a lot of foam in the class and the beer almost spills over.
The handaxe-like weapon that the Lubber demon uses is the same weapon Buffy uses in the episode "Anne" (3x01) of Buffy the Vampire Slayer. The weapon is a throwing axe/knife from Africa and is most commonly called a "hunga munga."
The text on the white board changes between each scene. It changes by size, font, placement and content.
The laws of physics take a pounding in this episode: the time freezing machine is powered by a power outlet, so the field dirupting the space/time continuum would have been terminated once it extended over said power source, as the electrons flowing from the outlet would have also been "frozen" in time, halting the field's progression and effectively shutting the machine down.
When Lorne (The Host) is behind the bookshelf in the library, one of the shots shows him wearing what appears to be a wedding ring. The ring is also visible when Lorne is talking to Angel in the lobby of the hotel.
When you see Gene typing on the white board explaining to the girl in glasses, he types something with an A. But in the next scene it changes to a P, and in another typestyle.
When Angel and Lorne (The Host) were being surrounded by all the Lubber demons in the street, they could have easily jumped back into the car and sped off.
Lorne (The Host)'s lip color changes from a deep purple to a blood red and to other shades in-between throughout the episode.
Cordelia's hair gets progressively blonder and streakier as the episode progresses.
Gene says that he never knew demons existed. However, he was at Caritas, which has plenty of demons singing and drinking.
Angel's convertible is missing the rear-view mirror (so the director can get a clearer shot).
In the final party scene, Cordelia switches from facing away from Wesley to facing Wesley from one shot to another.
(In their new office with papers laying everywhere)
Wesley: When they went out of business they just left these here?
Cordelia: Yup. Also the desk. We'll share.
Wesley: And when we go out of business we can just leave our stuff for the next guy.
Cordelia: Hey, hey, negative energy boy. With all of our money pooled together we can stay here a long time.
Wesley: 20 minutes.
Cordelia: At least.
Angel: Where did you learn how to drive?
The Host: Just now in your car. Not bad for a beginner, huh?
Angel: What? You nearly got us killed four times.
The Host: Someone had to drive. You weren't exactly qualified, huddled under a blanket in back, hiding from the sun.
Angel: Why'd you come to me?
The Host: Isn't it obvious? You're a champion. A unique force for good in a troubled world. Also, all the other champions I know are currently out of town or dead. Why? You don't want to work with me? Is this because I sent you on a couple of missions that turned out to be a little...
Angel: Pointless and deadly?
(Virginia finds Cordy, Wesley, and Gunn sulking in their run-down new office)
Wesley: Sorry, sweetheart. You just caught us in a moment of... Well...
Virginia: Oh - that. I avoid that.
Gunn: How do you avoid reality?
Virginia: Money. It cures everything but boredom (holds
up a basket of food) and food cures boredom, so there you go. Imported chips and packets of cheese.
Wesley: We'll enjoy them huddled 'round our pathetic candles.
Cordelia: We'll make pathetic nachos.
Virginia: You guys are really down.
Gunn: Yeah, and don't try to tell us there's nowhere to go but up. 'Cause the truth is, there's always more down.
Lorne: (about living) It's like a song. Now, I can hold a note for a long time--actually, I can hold a note forever--but eventually, that's just noise. It's the change we're listening for. The note coming after and the one after that. That's what makes it music.
Angel: Is there a reason you're here?
Lorne (The Host): Yes, there is. What's today, Thursday? Tomorrow night the world's gonna end -- thought you might like to know.
Wesley: (from under the desk, trying to fix the phone) Aha! Things are looking up. I think I found the right wire. Ah!
(The lights go out.)
Gunn: I'm so glad I met you guys. It's entertaining. Really.
Lorne (The Host): (to Angel) It's not always gonna be this way. The song changes. Unless, of course, we don't get there on time, in which case - you'll be frozen in this crappy mood forever. I shudder to think.
Lorne (The Host): But when he started singing -- man, he knocked me out!
Angel: He was good.
Lorne: No, Angel-face, he knocked me out.
Lorne (The Host): If the world were to end tonight, would it really, in your heart of hearts, be such a terrible thing? (Angel doesn't answer) Now, now, sweetie, is that a fun place to be?
Angel: I think you should shut up now.
Lorne: I'm the Host. Have you met me? I never shut up. You pushed your friends away. You went from helping the helpless to hunting down the guilty. Blood vengeance is a luxury of the lesser. You're a champion, Angel. I mean you were, at least.
Angel: Redemption. Darla had a shot at redemption. They took it from her. Now I have to hunt her down and kill her. I'm gonna do it. I'm gonna kill her, and then I'm gonna burn that law firm to the ground. My crew - they couldn't handle that. That's good. It means that they're still human. It means they're better off fired.
Angel: You want to know what my problem is? I'm screwed, that's my problem. I can't win. I'm trying to atone for a hundred years of unthinkable evil. News flash: I never can! Never going to be good enough. Now I got Wolfram and Hart dogging me. It's too much! 200 highly intelligent law school graduates working fulltime driving me crazy. Why the hell is everyone so surprised that it's working? But no, it's "Angel, why are you so cranky? Angel, you should lighten up, you should smile. You should wear a nice plaid."
Lorne (The Host): Oh, not this season, honey.
Lorne (The Host): You know what your problem is? Are you listening?
Angel: Do I have a choice?
Lorne: Your heart isn't in it anymore.
Angel: I don't have a pulse, so technically, I don't have heart.
Lorne: Technically, someone puts a stake through it, you don't have anything anymore. So, Bubba, your heart counts.
Lorne (The Host): (to Angel) Man, you just keep getting darker and darker. And the funny thing... your aura? Beige.
Angel: Can you just get to the point, already?
Lorne (The Host): Yes I can, if you'll let me get in a word edgewise, Mr. "Get to the pointy-pants."
Angel: Seventeen Karaoke bars. You know I need to lie down and scrub out the inside of my head.
Lorne (The Host): (to Angel) So, what we should do is start with the other Karaoke bars, see if we can get a lead on him. That is, if you're not too busy killing lawyers and setting girls on fire.
Sung by Gene at Caritas -- "All By Myself" by Eric Carmen
Karaoke at Caritas -- "Bye Bye Love" by The Everly Brothers
At Cordelia, Wesley, and Gunn's party -- "Hey Baby" by Mocean Worker
Lorne: You keep plugging away at that novel, F. Scott.
Lorne is referring to F. Scott Fitzgerald, who wrote, among other things, The Great Gatsby. Interestingly enough, The Great Gatsby is about a man who loves a woman and cannot have her, then gets desperate. Rather fitting for this episode.