I'm going to get so sycophantic here, because I adore most of the show's music so much! The theme tune itself is the very best (I'm listening to it right now), closely followed by my 3 favourite Kate Kestrel songs, recently mentioned in another thread. I quite like SOS and Faster than the Speed of Love, too. And I really like the background music they have when Hawkeye's craft gets going in the sky. Although I think A Christmas Miracle is one of the best episodes, I don't think much of the Kate song they used at the end, in place of the usual tune; it's quite an insipid record.