David Letterman signed off from late-night television after 33 years Wednesday night. 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 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.