During a recent taping of "The Late Show," David Letterman announced his decision to retire in 2015. Take a look at other high-profile personalities and their exits from particular shows or TV altogether.
Glenn Beck left his his Fox News Channel talk show in late spring 2011 after a short burst of success with the network. Almost immediately after joining in January 2009, he doubled the ratings at his afternoon time slot. Near the end, his ratings sunk and he suffered from several advertiser boycotts.