I can't help but imagine the influences were legion.
Glen's influences probably go back to the 1930's pulp sci-fi magazines, Heinlein, and every other sci-fi author who wrote of the potential of man vs. machine conflict. The basic thought is hardly unique; it's up to the creator of the specific work to make that rendition of that basic idea something special. Daleks were one such creation. Cylons were another.
And don't forget the original concept for the Cylon was a blending of organic and inorganic - the term coined for this was "cyborg" (think "Six Million Dollar Man"). However, network censors nixed the idea because killing machines wasn't as upsetting.
I doubt the "extermination" line came from the Daleks (but at the same time it wouldn't surprise me). That word - Extermination - carries a finality to it that "kill them" or something similar simply doesn't. It's a single word that says "genocide", "destroy" and "eliminate" all at once. I think any writer worth his salt would have chosen that word for that moment, whether or not he'd ever heard of Dr. Who.
But that's just my opinion. It's a good one, of course, if only because I'm a writer, but it's just mine.
I am
Dawg
