Battlestar Galactica

"Number Five", known to the humans as Aaron Doral, appears to be a man in his mid-thirties. He is initially encountered aboard Galactica, where he is operating as a public relations executive. Later he is active both within the fleeing Colonial fleet and on Caprica. He seems designed to network, almost to the point of being the sleazy used-car salesman type, but with a sadistic, violent side.

But Doral is a humanoid Cylon in reality. The Doral model's purpose is to attempt to sow the seeds of discontent or confusion, particularly during crucial life-threatening situations. Doral models endeavor to undermine authority that threatens his objectives. Doral models are more covert than the dazzling Sixes, assuming an ordinary "everyman" appearance blended in what may seem to be insignificant behind-the-scenes issues (such as converting Galactica into a museum). Fives are among the most militant, fanatic and consistent to the Cylon objectives (only the Threes match them), whether they are dispassionately discussing the fate of humanity with his comrades or attempting to kill or maim the Colonials in a suicide bomb attack (Litmus).