Eloise Hawking (Fionnula Flanagan) is an aging woman who helps the Oceanic 6 return to the island on "Lost" to prevent a catastrophe. She is the mother of Daniel Faraday (Jeremy Davies) and lived on the island as a part of a military expedition run by Charles Widmore (Alan Dale). Once described as a "temporal policeman" by writer Damon Lindelof, she appears to understand the dangers and workings of time. Later, when the island begins to travel backward in time, Eloise, as a young woman unknowingly kills her son Daniel. She also appears to Desmond (Henry Ian Cusick) when he travels back in time.
Ben Linus: "So what happens if I can't get them all to come back?"
Eloise: "Then God help us all..."