This one pretty much speaks for itself.  I had the honor of listening to Carl speak in person once, during a Planetary Society event following the impact of Shoemaker-Levey-9 into Jupiter.  He was every bit the science star I belived him to be.  He helped ignight my love of science with his Cosmos book and series.  This audio clip from his book "Pale Blue Dot" is read by Carl himself, and is shown to my students every Earth Day.

I ask my students to see how many epic movie clips they recognize.  The answer gets smaller every year!