Ellen Tigh is the wife of Colonel Saul Tigh, a genius scientist, and a Final Five Cylon. According to Sam Anders, she spearheaded the experiments that allowed Cylons to resurrect. She and the other four members of the Final Five Cylons are responsible for creating the humanoid Cylons that planned and carried out the Cylons to the Axis of Empires until was destroyed in the final days of the War