Blood cup

David Boreanaz told the secret of the blood-drinking scenes in Angel at the David Boreanaz European Event:

“Actually, it’s a cup. They created a cup, it’s like a spill cup, so it looks like there’s stuff inside, but actually not really. So it’s actually air. Tastes good. They do have a thick syrup they use sometimes, for blood scenes.”

Jeff Denton

Jeff played the vampire in the teaser of Lessons (who crawls from the grave and gets stuck, then attacks Dawn). Jeff was also in the Angel episode ‘Sleep Tight‘ in which he played ‘Lead Guitar’.

Kim

Kim had dropped out of Medical School and pursued singing on the advice of Lorne. She was infected by a Wraither Demon from a rock band she was in, which made her face change when she sang. Angel and Gunn took care of the Wraither demons and gave Kim an antidote.

Death to the cast

Many of the main Angel cast have been killed or near death. Angel was killed and vamped in 1753; Doyle was killed in Hero; Gunn was electrocuted by Gwen and revived in Ground State; Wesley’s throat was slashed in Sleep Tight, he was shot in The Thin Dead Line and finally killed in Not Fade Away; Cordelia was comatose for most of season five before dying in You’re Welcome; and Fred was killed when Illyria took over her body in A Hole in the World.

Britney Spears

Pop starlet Britney was supposedly due to play April the robot in I Was Made to Love You. She backed out at the last minute. Adam Busch (Warren) told Zap2it, “But then Britney backed out in the last minute and they got this other actress.” Coincidentally, Shonda Farr, who ended up playing April, appeared in the movie Crossroads, which starred Britney Spears.
There were rumours again that Britney was due to play another character in season seven, but Sarah Michelle Gellar apparently said no, as she felt the show wouldn’t benefit from the kind of publicity which follows Spears.
Britney is referenced in Life Serial, when the construction site foreman calls Buffy “Britney”. In Lessons, Dawn tells her class, “I love to dance. I like music. I’m very into Britney Spears’ early work before she sold out, so mostly her finger painting and macaroni art. Very underrated.”
In Sleep Tight, Angel says, “Yeah, and you look like hell. Not the fun one where they burn you with hot pokers for all eternity, but the hard core one. You know, Nixon and Britney Spears.”