The Last Cylon: Who is the Fifth of the Final Five in "Battlestar Galactica"

After the revelation of four of the "Final Five" in Battlestar Galactica's third season finale, two major questions were asked: "Who is the Fifth?" and "Are they actually Cylons!?"

After re-imagined series developer Ronald D. Moore assured fans in interviews that Chief Galen Tyrol (Aaron Douglas), Colonel Saul Tigh (Michael Hogan), Samuel Anders (Michael Trucco) and Tory Foster (Rekha Sharma) were members of the Final Five, the next logical set of question sprang to being.

Just who is the last Cylon? Have we already seen them?

To lay down the ground work for the article, there are several pieces of information that need to be made available to you. These key pieces of information are based on comments from both Ron Moore and several key actors on the series. However, it would be remiss of me to not mention that these comments could also be slightly deceiving -- particularly in light of the elaborate deception concocted by Moore, his partner-in-crime David Eick, and actress Katee Sackhoff to trump up Kara Thrace's death in "Maelstrom" as her final appearance in the series.

Having offered that disclaimer, I'll now state what has been revealed so far. In addition to being "fundamentally different" than the "Significant Seven" introduced previously, they have been Cylons from the beginning. Therefore, they are not clones, replacements, or any other doppelgänger cliché that has been seen before in science fiction.

In addition, Moore claims in the Frak Party podcast for "Crossroads, Part II" that he already knows who the last Cylon is, and that he's left clues for who it may be. An additional comment from Bradley Thompson also reveals that the they have known who the "Final Cylon" is since the end of season one, therefore the character cannot truly be anyone who hasn't been around since season one. (For the record, Thompson also noted that the rest of the Five were decided upon in the third season, a claim further supported by Moore.)