The episode “The Zeppo” can be seen as a lesson in the principle of comparative advantage. Or as a good laugh.
When was Angel invited into Rupert’s apartment (before “Passion”)? When was he invited into Faith’s motel room (before “Consequences”)?
Most of the Latin in Buffy is genuine. “Passion” contains both good Latin (hicce verbis consensus rescissus est, though Willow mispronounced it recissus) and pseudo-Latin gibberish (formatia trans sicere educatorum).
In “Some Assembly Required”, the three girls killed in a road accident are said to have died of “natural causes”. I was reminded of a line from a Mad parody of some crime movie: “Around here, that’s natural causes.”
“Dead Man’s Party” suggests the question: Can a cat be a vampire? Can a lizard?
In “Beauty and the Beasts”, someone ought to have asked: If the wolf got out, why would he return?
Why is it safe for Willow to swap spit with a werewolf?
Angel was able to enter Faith’s motel room, because it’s not her home. If she was renting an apartment, in theory, he would not be able to enter. I seem to recall an episode where he remarks that entering motel rooms is within “the rules”.
[This comment forged by Anton out of mail from Jerry, as an experiment.]
As for Ripper, it has been suggested that Angel was helping him with some books over the summer.