An evening pause: Though appearing somewhat hokey today, the original Star Trek is still one of the most intelligent television show ever produced, with decent writing that often expressed profound ideas. And it was about space exploration and the future! The clip below, from the episode Mirror, Mirror, illustrates all these things perfectly. And Kirk’s speech to the Spock from the alternative-universe expresses beautifully the significance of each individual’s responsibility to the world.

“One man cannot summon the future,” says the bearded Spock.
“But one man can change the present,” responds Kirk.