It is a sad and solemn occasion that we must bid farewell to “Battlestar Galactica.” In its heyday, “Battlestar Galactica” was a strong, powerful and intriguing series packed with the kind of hardcore drama that would leave you weeping with regret, gasping in shock and whooping in sheer elation; its special effects were of a standard that would leave you giddy at their majesty and stunned in their detail; its writers, all experts in their craft, offered concepts and ideals that no other sci-fi had ever dared to attempt; and its cast, so versatile in their talents that when they cried, you cried along with them.