David Letterman announced Thursday he would retire from the the Late Show in 2015. The revelation sparked plenty of nostalgia over the talk show host's career.
Letterman started with Late Night on NBC in 1982, making him the longest-running late night talk show host. The 66 year-old has kept viewers laughing for more than 30 years with segments such as his "Top 10" countdown.
In other words, this man was making listicles before most of you even knew what a GIF was.
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To honor Letterman's run, we've compiled a list of our favorite memorable moments throughout his late night career. From an on-air slap in the face to his sorrowful return to our screens in the days after Sept. 11, 2001, Letterman has truly been through it all.
One main question remains: who could possibly fill his shoes?
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