<P> Dr. Christian Shephard is a fictional character on the ABC television series Lost played by John Terry . He is the father of lead characters Jack Shephard ( Matthew Fox ) , who becomes the de facto leader of the survivors of Oceanic 815 after it crashes on an island , and Claire Littleton ( Emilie de Ravin ) , another of the survivors on the Island . Christian died of an alcohol - induced heart attack days before the flight , leading to much of his story being told through flashbacks . In the fourth season and fifth season he is again featured on the Island several times , seemingly acting as a messenger for the leader of the Others , Jacob ( Mark Pellegrino ) . In the sixth season , the Man in Black ( Titus Welliver / Terry O'Quinn ) admitted that he had `` impersonated '' Christian during the first week after the crash of Flight 815 . </P>
<P> Dr. Christian Shephard is a fictional character on the ABC television series Lost played by John Terry . He is the father of lead characters Jack Shephard ( Matthew Fox ) , who becomes the de facto leader of the survivors of Oceanic 815 after it crashes on an island , and Claire Littleton ( Emilie de Ravin ) , another of the survivors on the Island . Christian died of an alcohol - induced heart attack days before the flight , leading to much of his story being told through flashbacks . In the fourth season and fifth season he is again featured on the Island several times , seemingly acting as a messenger for the leader of the Others , Jacob ( Mark Pellegrino ) . In the sixth season , the Man in Black ( Titus Welliver / Terry O'Quinn ) admitted that he had `` impersonated '' Christian during the first week after the crash of Flight 815 . </P>
what happened to jack 's dad in lost
what happened to jack 's dad in lost
died of an alcohol - induced heart attack days before the flight
died of an alcohol - induced heart attack days before the flight