 Later on, he had another encounter with Daniel Faraday in "The Variable", who frantically demanded to see Ellie and the bomb he told their people to bury.Ellie shot Daniel in the back, much to Alpert's displeasure, and he listened as Daniel explained to Ellie she was his mother.Ellie was convinced Daniel was telling the truth, and Alpert joined her, Jack Shephard (Matthew Fox), and later, Sayid Jarrah (Naveen Andrews) in retrieving the hydrogen bomb in "Follow the Leader".