From Mrs. Krabappel on "The Simpsons" to Mr. Kotter from "Welcome Back Kotter," check out some of the most memorable TV teachers.
Mr. Kotter from "Welcome Back Kotter," played by Gabe Kaplan
The following five celebrity urban legends will likely live on long into the future, despite the fact that none of them is remotely true.
Whatever their reasons, more than a few stars have decided to walk away from their chosen fields only to get the itch and return -- some more than once. Take a look at some celebrities who have "unretired."