As with most characters on "Lost", Ben's history is revealed through flashbacks and episodes set in other time periods which are revealed slowly as the series progresses. Sterling Beaumon first portrayed a young Ben late in season three, in the character's first centric episode, "The Man Behind the Curtain". Ben's childhood is further explored in the fifth season of the series, partially set in 1977. Fifth season episode "Dead Is Dead" explores Ben's fragile state following the events of the fourth season, in which his loyalty to the island led to the death of his adoptive daughter Alex Rousseau (Tania Raymonde), and flashbacks show the audience Ben's original acquisition of Alex and his rise to leadership of the Others, after exiling his rival Charles Widmore (Alan Dale). Originally cast for three guest appearances in the second season, Emerson's role was expanded. As leader of the Others, Ben became a regular cast member from the third season onward. Reviews of the show would often focus on Ben's mysterious motives. Emerson's portrayal garnered many positive reviews, resulting in nominations for the Emmy for Outstanding Supporting Actor year-on-year from 2007 to 2010, winning in 2009.