4x15 "First Contact" - The Enterprise crew makes First Contact with an alien race on the verge of constructing its first warp drive. But paranoid conservatives threaten to derail the whole thing. This is a rather good episode, with the crew trying to convince the aliens that they really are benevolent, despite certain appearances. It tries very hard to paint the liberals as nice, kind people and the conservatives being ruled by fear. But its major failing is that, ultimately, the liberals concede to the conservatives which is frustrating to say the least.