The following contains MAJOR SPOILERS for the episode “Bad to the Drone” from the SciFi Channel series “Eureka.” In an episode dealing with a missile defense system and killer drones, I conclude that the season premiere of “Eureka” was definitely a misfire. And that is a shame. “Eureka” is really beginning to show its age, and we are only at the beginning of the third season. Let’s hope this is a one-time blip on the radar screen and not an indicator of things to come. This episode deals with a smart drone, named Martha, getting too smart and escaping control of Global Dynamics control. It turns out someone else was controlling the drone, so Sheriff Carter puts his investigative powers to work, picking up obscure clues and extrapolating them into motives that make little sense but get explained …