Battlestar Galactica: The Complete Series (Blu-ray)
This 25-disc set is the definitive collection of one of the decade's most stunning dramas. The high-definition audio and sound make every battle come to life, and the set is packed with bonus featurettes, cast and crew commentaries, and unaired extended versions of key episodes. Plus, you get a collecible Cylon figure. If you haven't picked this one up for the nerd on your list, what the frak are you waiting for?