he would fit the character well.<ref name=DVD>Audio commentary for "The Man Behind the Curtain, Season 3 DVD set of Lost</ref> He was originally contracted to appear in just three episodes of Lost, making his first appearance midway through the second season, in episode "One of Them". The producers were so impressed by him that they contracted him for a further five episodes, citing the scene at the end of "The Whole Truth" where Ben asks for milk as the moment they knew he was a "keeper". He was then made a part of the regular cast from the third season. Had Emerson not worked out during his initial appearances a different actor would have been cast for the leader of the Others, but it was always intended the survivors would have the leader right under their noses and not realize it. During one episode of the Official Lost Podcast, the producers state they always knew Ben would be the "Big Bad". Emerson had no idea of his character's importance during his second season recurring role. He was told nothing about Ben's backstory and would only receive scripts at the last minute. He enjoyed how the ambiguity of Ben's motives allowed him to "paint it the way [he] please[s]". Sterling Beaumon was cast to play Ben in the flashbacks of episode "The Man Behind the Curtain". Emerson's wife Carrie Preston was cast as Ben's mother following Emerson telling people at parties she was desperate for a part on the show. Referring to the scene in the third season where Ben seemingly fits Sawyer with a lethal pacemaker, Emerson comments "Sadistic may be the word, but he doesn't seem to take much relish in it. He's just sort of detached, he looks at it coldly. I sometimes feel like everything to him is a sort of scientific experiment and he is interested in a dispassionate way in how the experiment runs its course. I think some day if we ever find out what his parentage is, that his parents were people of science". Elizabeth Mitchell, who plays Juliet, did not think it was a "huge surprise for Juliet that Ben had feelings for [Juliet], but I still think it was... it was horrifying under the circumstances". She also thought "[Juliet has] this kind of wonderful mind, and I think that Ben probably has a tremendous respect for that. It's not because Juliet