Actors have day jobs, but with an eye on a paycheck, a fun day's work, or an Outstanding Guest Actor Emmy, they moonlight in TV guest roles, too. Here are a few performers (and one non-performer) who will soon provide their Guest Services.
Not Roger Sterling (Jeff Kravitz/FilmMagic.com)Actor: John Slattery
Day Job: Roger Sterling on AMC's "Mad Men"
Guest-Starring On: "The Simpsons"
Role: Unknown!
Pros: Slattery is a great comic actor (as we were recently reminded when he guested on "30 Rock" last year).
Cons: We don't get to see his face?! That's the moneymaker!

