44. Dr. Who
Composer: Ron Grainer
Perhaps the most recognizable theme song across the pond, Dr. Who is an electronic heavy theme. The original actually grates on me a bit, and it sounds like it would fit more of a horror theme than sci-fi. But I do enjoy the 2000 renditions, including the one below.
Composer: James Newton Howard
Very understated, easily recognizable. It doesn’t exactly get me excited to watch the show, but very pleasing to the ear. I also love the video sequence.