Late night TV hosts through the years

POSTED: 1:39 PM Apr 10 2014   UPDATED: 11:22 AM May 20 2015

As David Letterman signs off from the "Late Show" for the last time, take a look back at memorable late night hosts through the years.

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NBC Television

Steve Allen -- "Tonight Starring Steve Allen" (September 1954-January 1957, NBC)