A call for volunteers is made for a final mission, as Galactica is stripped for parts.“Galactica” mastermind Ron Moore co-wrote the two-hour series finale for “Star Trek: The Next Generation,” which starred Visor-Free LaForge and Greenskeeper Picard and received overwhelmingly favorable notices. The finale script for “Battlestar Galactica” apparently put everyone in tears, including Ron Moore himself. The first hour of the three-hour finale airs tonight; the final two hours air next week. 10 p.m. Friday. SciFi