Here's one right off the bat: Babylon 5, a science fiction TV series created by J. Michael Straczynski. Elements like Rangers, the Grey Council, Lorien, and Z'ha'dum (Khazad-dum with letters removed and reordered) appear on the show. More also appear, including a direct quote from The Fellowship of the Ring.
Here's a more complete listing of influences, inlcuding Tolkien's, on that show:
I know the show is about 20 years old now, but it's still one of the best sci-fi shows around, IMO. Catch it if you can.