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.