Here are links to the show:
http://documentaryheaven.com/iceage-columbus-who-were-the-first-americans/
http://store.discovery.com/ice-age-columbus-who-were-the-first-americans-dvd/detail.php?p=84844
Thanks GreyFriar for the pings and the links. Vero Man ping! BTW, imho, US study of the PreColumbian past would have been best served in the long term if someone had just blown Ales Hrdlicka's brains out before he took over the Smithsonian. If I ever have a time machine...