Simon O'Neil "Number Four"

"Number Four", also referred to by his human name Simon O'Neill, is a Humanoid Cylon that speaks calmly and purposefully, and tends to use logic as a means for his operation or resolving issues (TRS: "Torn"), and is not as religious as his counterparts. This model appears to be the medical specialist of the Cylons and also takes on the role of a doctor or medic when functioning as an infiltrator (TRS: "The Farm", "Six of One", "The Plan"). Apparently the infiltrators of this type are more likely to use their medical skills subversively than to engage in direct combat.

"Number Four", also referred to by his human name Simon O'Neill, is a Humanoid Cylon that speaks calmly and purposefully, and tends to use logic as a means for his operation or resolving issues (TRS: "Torn"), and is not as religious as his counterparts. This model appears to be the medical specialist of the Cylons and also takes on the role of a doctor or medic when functioning as an infiltrator (TRS: "The Farm", "Six of One", "The Plan"). Apparently the infiltrators of this type are more likely to use their medical skills subversively than to engage in direct combat.