The search for his missing sister has become the linchpin of Mulder's life, driving him to abandon a dazzling carreer for the dusty realms of the X-Files. Samantha Mulder was eight years when she disappeared."It tore the family apart", het tells Scully. "No one would talk about it". Mulder himself repressed the incident until his hypnotic regression sessions with Dr. Heitz Werber, who took him through hypnotic regression in 1989, freeing his confused memories. Since that time, there have been tantalezing glimpes and hints of her fate: in "Miracle Man" a faith healer hinted that she may still be alive. In "duane Barry", a self-proclaimed abductee warned mulder that children were often seen in the alien ships undergoing painful test. The appearance of a woman claiming to be Samantha in "Colony" and "End Game" seemed to solve the mystery. Mulder risked his life to discover the thruth about her, but in the end his quest raised even more questions than it answered. Still, as he told Scully, he found one thing he needed: faith to keep looking.