Episode 5.14: The Variable (Faraday-centric) (100th episode)
Airdate: April 29, 2009

On the 100th episode milestone for the series, the time of reckoning has begun when Daniel Faraday comes clean regarding what he knows about the island.

Major spoilers: Faraday is the son of Widmore & Eloise. Faraday arrives back to the island by sub. He tries to get Chang to evacuate the island by telling him the truth about the island and Miles. He ventures into the Other’s camp to talk to his mother who shoots and kills him prior to talking to him. Eloise is not portrayed as a villain because she doesn’t know (at the time she kills Faraday) he’s her son. She learns of his plans through Jack and Kate, and tries to see them through with the help of Richard.

Look for Mrs. Hawking explain stuff like her relationship with Charles Widmore and for Daniel to explain some of the mysteries of the Island. [...] Also present are Penny and Charles Widmore and Charlie Hume (not to be confused with Charlie Pace). As for the variable itself, it will almost certainly tie back to the equations and notations from the blast-door map we saw in season two, which included such bon mots as “Geological composition likely to cause magnetic disturbances/interference with weather project,” “Primary nexus of Cerberus-related activity” and the infamous Valenzetti equation.

This episode is a direct follow up from “The Constant.” It continues with Desmond’s and Daniel’s adventures. We get more info on Daniel’s notebook statement “Desmond is my Constant.” The early planning of this episode may explain why Desmond left the army.

George: 10 years old, very intelligent, sharp and bright. A child prodigy who is already completing high school level work. Extraordinarily gifted as a science student and musician, he still deep down simply wants to make his parents proud and get their love. Looking for someone with brown hair and brown eyes. Please submit actors that can play some piano.

Sophie: Late 30’s – 40s, British. Very intelligent, skillful, prim and proper aristocrat yet someone who is tough and resourceful when necessary to protect her family. Looking for actress 5′0″ to 5′4″ in height for matching requirements. Must have an English accent. Probably recur.

Guest Cast: Nestor Carbonell as Richard Alpert, Sonya Walger as Penelope “Penny” Widmore, Alan Dale as Charles Widmore, Francois Chau as Dr. Pierre Chang, Fionnula Flanagan as Eloise Hawking, Patrick Fischler as Phil, Eric Lange as Radzinsky, Sarah Farooqui as Theresa, Alice Evans as younger Eloise Hawking, Wendy Pearson as E.R. doctor, Todd Coolidge as paramedic, Peggy Anne Siegmund as caretaker, Jennifer Sojot as E.R. nurse, Spencer Allyn as young Daniel Faraday, Michael Dempsey as foreman, Maya Henssens as young girl, Ariston Green as workman, Marvin DeFreitas as young Charlie and Brad Berryhill as anxious guy.

Credit: SpoilerFix.com, ABC, Lost Spoilers, Kristin on E!Online