On The Glades: "The Glades Cast Isn't Ready for Polyamory"
I don't watch The Glades on A&E, but in an episode this summer it found a way to air a couple minutes of good basic poly education. A character even reads aloud from a fictional polyamory guidebook (by a PhD) to explain compersion.
A&E put up a 2-minute video clip of this:
Year by year, more of the culture seems with us. Or at least takes us seriously.
Update: Just found out that they also posted another nice, respectful 2-minute clip from the same storyline. This one is titled "Longworth is Introduced to Polyamory":