Great sci-fi usually is accompanied by an iconic opening theme. If your program is decades old, you often find a need to refresh that theme from time to time. That’s exactly what Peter Howell did to the classic Doctor Who theme. He brought in an electronic 80’s (late 70s) aesthetic to an already ethereal sound. I began watching just before this change happened, and since being a US PBS viewer I didn’t hear the new version until about 1983-84-ish.