At Christian Shephard's memorial service, Carole Littleton, who has recovered from her coma, tells Jack she and Christian had a relationship which produced Claire, revealing her to be Jack's half-sister.
Jack and Claire have the same father, Christian Shepard. Claire never met her father until he decided to pay for Carole Littleton's hospitalization. Even then he didn't tell Claire his name because she said she didn't want him to.
"One of Us" is the 16th episode of the third season of Lost. It aired on April 11, 2007, making it the 65th episode of the series. The episode was written by Carlton Cuse and Drew Goddard and directed by Jack Bender.
Claire Littleton - Jack's illegitimate half-sister who crashed with him on Oceanic Flight 815.
Aaron was left behind by Claire in the jungle for unknown reasons when she followed his grandfather, and Aaron was passed through multiple survivors (Sawyer, Kate, Sun) until he made it to the freighter where he was then picked up by the helicopter.
At Christian Shephard's memorial service, Carole Littleton, who has recovered from her coma, tells Jack she and Christian had a relationship which produced Claire, revealing her to be Jack's half-sister.
We learned that Kate learned that her stepfather was, in fact, her real father, from her real father, who wasn't her father at all. (All together now: Whaaa?) We learn that Kate has ”murder in her heart.” (Pseudodad knew this from birth?) And that Sawyer loves Kate, at least when he's feverish and raving.
Kate tells Sam that she recently discovered that Wayne was her biological father. Sam reveals that he had known this all along but had hidden the truth because he feared Kate would kill Wayne if she ever found out.
In the original timeline, Juliet never raised a son, and, to his knowledge, Jack never had one either.
At the end of the episode, Jack and the Others travel back to the main island on a boat. Just before leaving, Isabel translates Jack's tattoo, "He walks amongst us, but he is not one of us".
Claire is the oldest child of John 'Jack' M. McLeod (Anthony Hayes; Troy Gray). She was born on Drover's Run, in 1973, to Jack and his first wife, Prudence 'Prue' McLeod (Sarah Enright). Prue died while giving birth to a stillborn son, Adam John McLeod, in 1975.
Jack thought that Clare shouldn't move heavy things. He was worried because she was six months pregnant. It would be their third child.
In the 18th century, Claire winds up married to James Alexander Malcolm MacKenzie Fraser, of Clan Fraser of Lovat. They have several children: Faith, who doesn't survive birth; an adopted son named Fergus; and a daughter, Brianna.
Origin: Jack saw examined Aaron's mother before his birth. Since Then: Jack saw Aaron soon after he was born, and Claire occasionally consulted him about the baby's health. Off-island, Jack learned he was the child's uncle, and he initially refused to see him. He eventually changed his mind, and he helped raise Aaron.
Viewers watched Jack (played by musical theater actor Blake Stadnik) meet and fall in love with Lucy (Auden Thornton), a waitress aspiring to be a chef, before the episode revealed that he is actually Kate and Toby's baby boy, who was born prematurely at the end of the last season.
It is suggested throughout the fifth and sixth season that Kincaid and Executive ADA Jack McCoy (Sam Waterston) have a sexual relationship. However, it is not explicitly stated until season 9, long after the character had been killed in a traffic accident and exited the show.
Jacob represents the Tree of Life. He can give life, heal, even resurrect (Locke). His touch is a gift.
Sawyer, Kate and Claire made it off the island for good aboard the Ajira plane (accompanied by Miles, Lapidus and by the finally-aging Richard.) Hurley, Ben and Desmond stayed behind to protect the island.
Jack reawakens outside by a river and walks toward the bamboo forest. After Jack collapses to the ground, Vincent approaches him and lies next to him. Jack gazes happily at the sky while watching the Ajira plane fly overhead away from the island. Jack slowly closes his eyes as he dies.
In "What They Died For", Jacob explained to Kate that her name was crossed out when she became a mother -- and alluded that he was looking for people who were alone in the world to replace him. He also stated that Kate was still eligible and that the names in the cave were just marks drawn with chalk.
She raised Aaron Littleton as her son, but she finally decided to return to the Island to rescue his mother, Claire. Once she returned to the Island, Kate was stranded in 1977 with some of the other survivors.
Sun had an affair with Jae Lee, the same person who taught her to speak English fluently. Sun's father found out about the affair, and he told Jin to "deliver a message" to Jae Lee.
Toby and Kate's marriage, which was already on the rocks with more trouble in sight, went off the cliff and full bore into the rapids on Tuesday's episode of "This Is Us." The couple lost baby Jack while hosting an anniversary party at their house for Miguel and Rebecca, a mishap that incited yet another argument as ...
The horse is a sign that Kate is saved. It did save her before by crashing the marshal's car after her arrest. The Smoke Monster/Island manifested itself through the horse (as well as through Sawyer, posing as Wayne) in order to test Kate.
In the season 4 finale, Sawyer jumped from the helicopter to ensure the Oceanic Six would be able to make it to the freighter. Before he departed, Sawyer whispered a favor in Kate's ear, asking her to make sure Cassidy and his daughter were taken care of.