A reminder that NBC will show an episode of "Medium" in 3D on Monday, Nov. 21, 10pm EST. You can get the anaglyph red-blue glasses in this week's TV Guide, which features a few show-related 3D images. A huge oversight - since the magazine comes with the glasses, they should've run a few 3D ads to test the waters. It'd be interesting to see whether NBC has managed to line up any advertisers to run 3D commercials. Seems to be a very logical idea.