Danielle Rousseau
In the fourth episode of the season, after another shift in time, Jin is found unconscious floating on some debris from the freighter by a group of people in a life raft, who turn out to be a young and pregnant Danielle Rousseau (Young: Melissa Farman; Older: Mira Furlan) along with her research team. After realizing who Danielle Rousseau is, Jin is shocked to realize he has traveled back in time to 1988.