So my parents are pretty big Trek fans. They've watched TOS, TNG, and VOY, as well as most of ENT. But for some reason, they've never had any desire to watch DS9. Their main argument is that it's not "Trek" because it's set on a station, and the crew "doesn't go anywhere". Parents. So illogical. I know they'd really enjoy DS9 if they just watched it. What should I say to convince them, at least, to give it a chance? How would you convince someone to watch it?