Highly intelligent, doggedly determined. Ellison was once one of the FBI’s top agents until he was assigned the seemingly simple task of hunting down and bringing to justice a dangerous fugitive - Sarah Connor. When his pursuit of Sarah Connor went awry, Ellison’s stature was diminished in the eyes of his fellow agents. He now has an unrelenting resolve to apprehend Sarah Connor to exonerate himself.

[from http://www.fox.com/terminator/]