Number Four

Humano-Cylon agent.

Simon pretends to be a doctor caring for Starbuck until she discovers that he is actually a Cylon. He tries to casually persuade her into bearing children but is unsuccessful. When his diplomatic efforts fail he begins to operate on her, first harvesting her eggs then on orders from Six, attempting to surgically remove her ovaries. He fails in his task when Starbuck realises he is a Cylon, kills him, and escapes from the "baby farm" he's running. Simon is the latest Humano-Cylon to be revealed, bringing the total number of known agents to 5 so far. He is also the first new model agent revealed since the Mini-Series.

Like Six, Simon's models seems to have different roles. Two types of Simons were seen during his debut in "The Farm": one was a doctor Simon and the other was a more well kempt Simon who wore a dark business suit. Both models were killed, the doctor model by Starbuck and the suit model by the resistance movement when they stormed the "farm" to liberate her.