Daniel Faraday (Jeremy Davies) is a physicist who studies time. In the last season, viewers find out that he is also the child of Eloise Hawking (Fionnula Flangan) and Charles Widmore (Alan Dale). His research into time, leads him to become part of a research team which travels to the island as part of a plan by Widmore.
Daniel is one of the few characters who understands how to travel to and from the island and is on the research team to advise them. His mother, Eloise, encouraged development of his scientific mind from a young age. This encouragement led to him being given a research grant from industrialist Charles Widmore, to study subjects relevant to his quest to return to the island. At the time, Faraday is unaware that Widmore is his father. Faraday is also visited in Oxford by a young Desmond Hume (Henry Ian Cusick) seeking help with temporal displacement. Daniel advises Hume that he needs a temporal constant to stop his displacement. Faraday also demonstrates, using a mouse, that Hume will die if he does not cure his displacement. It is later revealed the Faraday experimented on a person with disastrous consequences.
Faraday dies on the island when he travels back to the 1950s to disable an unstable hydrogen bomb. During this trip, the young version of his mother shoots him. There is a very emotional scene in which he tells Eloise that he is her son. It is indicated that she must have known she would kill him if he came to the island, yet she still set him on the same path.
The story lines surrounding Faraday are essential in providing background information on the island and how Charles Widmore and Eloise became involved in the struggle for control with Ben Linus (Michael Emerson). Additionally, the flashbacks showing the results of Faraday's research are key to demonstrating the negative effects of temporal displacement. While Faraday is not one of the main characters, he is an essential addition to the cast.
"We're either in the past or we're in the future."
"You knew all along - you knew this would happen. And you sent me here anyway... "