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.
Host Conan O'Brien left his own "Late Night" show, which ran for 16 years, to host "The Tonight Show with Conan O'Brien" in 2009. The show only lasted for eight months before he was let go. In November 2010, O'Brien launched "Conan" on TBS.