NEW YORK (CBSNewYork) — As David Letterman approaches his final Late Show broadcast on May 20, we thought we’d put together a “Top Ten List” of facts you may not know about both Late Night and the Late Show:

1) The first face to appear on both “Late Night” and the Late Show was that of Calvert DeForest or, as he was known on “Late Night,” Larry ‘Bud’ Melman.

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2) Bill Murray was the first guest on the premiere broadcasts of both “Late Night” on Feb. 1, 1982 and “The Late Show” on CBS on August 30, 1993. As of May 20, 2015, he will have appeared on Letterman’s late night talk shows 44 times.

3) There have been a total of 89 “Stupid Human Tricks” segments.

4) There have been a total of 126 “Stupid Pet Tricks” segments.

5) The first Top Ten List, “Things That Almost Rhyme with Peas,” aired on “Late Night” Sept. 18, 1985.

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6) Sportscaster Marv Albert had the most “Late Night” appearances with a total of 73.

7) Regis Philbin holds the title of “most Late Show appearances,” with a total of 136.

8) As of May 20, 2015, there will have been 6,028 broadcasts of Letterman’s late night talk shows.

9) Letterman’s fictional “Top Ten Office” has made its home in 11 different cities, with Nebraska having the most with three.

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10) Both “Late Night” and “Late Show” theme songs were written and composed by Paul Shaffer.