Mmm, OK. I wasn't aware in advance that Joan Rivers would be guest starring, but she did a pretty good job. Krusty's show-biz trials have been done before, and this was a decent entry. Nothing super leaped out at me, though I was pretty amused at the idea of the "epilogue text" I&S since it completely misses the point.
DYN ...Krusty's agent also represents Gabbo (and Arnie Pye, and apparently no one else)?
Previous episode stuff DABF12: One of the Simpsons clips seen on Hulu is "Moe gets a cell phone" NABF09: Hulu mentioned outright as a way to watch this show DABF21: King of the Hill opening time lapse parodied FABF07 (and to an extent AABF12): TV museum 4F15: Krusty's way of being "fired" a bit like the catapult (at least it wasn't into the sun) 5F10: Janeane Garofalo reappears (in another Krusty kareer episode too)
Meta -Krusty talks about the 1-year delay of any topical jokes in animation -The whole Hulu bit (see above) -"Everything's a ripoff of The Honeymooners" (see also, for example, 4F12)
Lip sync When Krusty talks about "caca and tatas" his lips seem to be saying something else, which looked like maybe "peepee and poopy". Later, with the execs near the end of act 3, there seems to be more last- minute line substitution. We haven't seen a lot of that recently.