Napftor
Explorer
I don't know if any DM can say he hasn't ripped off (directly or indeirectly) something from TV, film, or book. I've done it so many times that I wouldn't know where to start telling you about them. The great part is, with RPGs and sci-fi/fantasy genres sharing much the same audiences, you don't even have to disguise what you rip off to make it work. If your players recognize what you've done, they'll simply identify it aloud and thus deepen the communal experience of role-playing.