I boldly went
Star Trek: The Original Series
This show was the first realistic speculation of mankind's future. How realistic? Look at Roddenberry's communicators, medical equipment, computers, interacial crew, women officers, etc., etc.
I was 12 yrs.old, living in a frozen-tundra-of-an-airbase where my father was stationed. TV and books were our entertainment, and there wasn't much on tv in those days interesting to a highly-imaginative adolescent with a bent towards science fiction.
It was the ONLY tv show for me. It was the visualization of where my imagination had taken me. I couldn't wait to grow up so I could be an astronaut, and Star Trek was my shortcut! Its influence on my still-forming character was as profound as that of any teacher. I saw: an interacial work environment where women weren't just secretaries, friendship between different species, the silliness of animosity between a black/white-faced man and a white/black-faced man, the horrible apathy of computerized war, the effect of erradication of disease on population, the destructive nature of distorted religious values, the unlimited potential of mankind...