On Friday evening, Battlestar Galactica ended its four-season run as one of the most popular science fiction shows in recent history. 2.4 million people tuned in for the finale, and reactions to the ending — positive, negative, and often a mix of both — are springing up all over the internet, as are tributes and retrospectives. Producers Ron Moore and David Eick held a Q&A session after the finale to discuss certain aspects of the story and spell out the final status of several plot lines. Fans of the show will have a chance to see the Cylon side of the story this fall in a two-hour TV movie titled "The Plan," and we've previously discussed the spin-off prequel series, Caprica, the pilot for which will come out on April 21st. Be warned: these links and the following discussion will contain spoilers.