Jon Hamm is hardly the first big name to cameo on 30 Rock this season. Here, we grade the parade of marquee players.
Calypso! Sweater capes! Never has there been a truer send-up of O power and this time she's in on the joke. A
His turn as a criminal-posing-as-eccentric-agoraphobe strains even 30 Rock's wide wackiness threshold. B-
Her go-for-broke appearance as Liz's crazy friend from college reminds us why she's a star, tabloids aside. A-
We can see why Jack would instantly fall for his mother's caretaker but it's not because she's hilarious. C+