Crossover with Neverwhere: Dumbledore's guess as to where that veil in the Department of Mysteries leads was a bit off the mark, and now Sirius has to try to get home.
Crossover with Good Omens: As if anthropomorphic holidays and hurricane-themed spontaneous singing weren't enough, Lawndale now gets to deal with fallout from the end of the world... well, sort of....
Crossover with Doctor Who: After all the excitement dies down, another complication arises. NB: Very heavy spoilers for Pyramids.
Crossover with To Wong Foo, Thanks For Everything: In which a friend of Angel's tries to be helpful, really.
Crossover with Doctor Who: In which Maureen spends some time... abroad, and puts it to practical use.
A rather massive AU project, in which Angel and Mark meet in high school rather than all those years later.
Between What You Own and the finale: Mark angsts. Alexi interrupts... or tries to, anyway.
Angel drops by the loft, and ends up giving Mark his take on the Alexi Darling! matter.
A couple of years prior to canon, Angel gets a call from an old friend.
Horsepersons fic: War's in a bit of a slump, and Pollution helps her out of it. Implied War/Pestilence.
Brief snippet of a thing: Aziraphale opens his first bookstore.
Crossover with American Gods: War's trying to get to business, but first she has to get around one of the new guard. (Rated mostly for language.)
Crossover with Hitchhiker's Guide: Crowley finds an interesting gadget.
Horsepersons fic: the first Christmas wasn't any easier than the rest of them.