Sine Qua Non en
"Sine Qua Non" is the tenth episode in the fourth season of the re-imagined Battlestar Galactica. It first aired on television on May 27, 2008. The episode name is a Latin term referring to something essential that cannot be done without. The survivor count shown in the title sequence is 39,674. Wikipedia [ - ]
- With President Roslin missing along with the cylon base ship a new president must be decided on. Galactica goes on a search for the missing base ship and the Galactica crew members that were on board.