Season 2 was a drastically different, far worse show than season 1. They changed producers, killed off half the cast (including the most popular character), stripped the remaining half of their personality, replaced the first-season aliens with a different, human-appearing faction, transformed the setting into a dreary post-apocalyptic world without any explanation for the change, and just generally told awful, unpleasant stories. There was some slight improvement in the latter half of the season, but the series finale was ridiculous. Unless you're a huge fan of Adrian Paul, Denis Forest, or Catherine Disher, I say skip it.