Thought long and hard about this next one and, really, this is the TV show above all others that got me into SF.
As a 7-year old it wasn't the characters, the plot or any of that. It was the fact that i'd never seen anything like it before and, i'm guessing, back in the late 60's neither had many other Western folk.
Its the show that has the deepest impact on me, on the most emotional of levels. I listen to this theme song and i'm a nipper again.