They return to the world as the Oceanic six with them lying about the island and how only seven of them survived the crash but the other two died along the way. That being Boone and Libby who both died before rescue. They also lie about Kate being pregnant aboard Oceanic flight 815 and her giving birth to Aaron. They continue their lives with Sun going to Seoul to confront her father and raise her daughter Ji Yeon. Hurley going home with his parents and going back to his mansion. Sayid married Nadia. Jack went back to the hospital and Kate while facing her sentencing raised Aaron as his mother. Frank Lapidus went back to being a pilot and both Penny and Desmond continued their relationship but far away from her father. Three years had passed with Lapidus being a pilot for Ajira airways. Desmond and Penny had a son that they named Arthur, to remember that even though they lived on a boat, their son was both Scottish and English. Sun continued to raise her daughter but also began to work for Charles Widmore to kill Ben. Sayid after the death and funeral of his wife; began to work for Ben and take out Charles Widmore's people. Hurley after seeing his dead friends appear to him went back to Santa Rosa. Jack found out about Claire being his sister when he met her mother at his father's service. He continued to be a surgeon at the hospital and began to date Kate after her trial and they raised Aaron together. They eventually broke up after Jack had an outburst and told the truth in front of Aaron that Kate wasn't even related to him. Locke returned to bring them all back, he had help from Charles Widmore and Matthew Abaddon. Locke failed to encourage Sayid and Hurley to return, he then reached Kate. He told her about how everyone would die if she didn't return but she still said no. Locke asked if she cared about them, but Kate replied that she thought he had never loved anyone and that's why he wanted to stay on the island. Locke told her about Helen and how they didn't work out. Locke made one final attempt "I can't make it up to her, but we can make it up to those we left behind. They are waiting for us to return. Sawyer, Jin, Juliet, Miles, Daniel, Charlie, and Claire all waiting for us, and we can't let them down".
Kate told him "My answer is still no John".
Locke said, "Jin pleaded with me to not bring his wife to come back to the island with their child who he believes she is still pregnant with".
Kate said, "it's been three years John".
Locke told her "I came here only after a couple of days on the island, so I can't be sure how long it's been for them, but they want to come home to see their families and Claire".
Kate interrupted "don't say it John, just don't".
Locke responded "I know about what's happened with you guys since you left; especially what happened to you and Jack, but you should have seen Claire when I left. She asked me to not bring Aaron back and leave him with her aunt who she believes he is with. This was done so he can stay safe until she can come home and see him again".
Kate said, "she left him in the jungle".
Locke told her "She was taken and when Charlie found her, she was in a trance. After seeing it holding Aaron, she blacked out and woke up with Charlie next to her in the jungle. She was distraught that it forced her to leave Aaron but were coming back to the camp and to the boat when the island moved. I finally found them and all she wanted to do was get off and be with her son".
Kate responded "I'm sorry, I really am but I'm not going back. I can't I'm all he has".
Locke asked, "is the reason that you are not going back, is because then, you are all he has".
Kate answered sternly "no and how dare you even ask me questions like that".
Locke responded "my apologise, Kate. I'm sorry for intruding". Locke left before going to visit Helen's grave. Him and Matthew were attacked, and Matthew killed. Locke tried to drive away but got into a car accident. He was taken to hospital where Jack was in his room, and he tried to convince him to go back. Jack refused and Locke said, "whatever it was that wanted me to come back, was in the form of your father and he wanted me to say hello to his son, the son of Christian".
Jack responded, "I'm not listening to this John".
Locke pleaded "Jack please you have to come back. You're the only one that can convince the rest of them, you have to help me. You're supposed to help me".
Jack fired back "John it's over, it's done. We left and we were never important. So, you leave me alone and you leave the rest of them alone".
Locke was about to commit suicide when Ben came into his room and told him about the flight that Jack booked. Ben got Locke down and insisted they go after Sun, but Locke rejected because of his promise to Jin. Ben agreed and insisted that they get everyone together before figuring out how to get back to the island. Locke informed him about Eloise Hawking being their way back and after Locke said this, Ben killed him and made it look like suicide. Jack heard about Locke's death on his flight back. He tried to kill himself, but a car crashed, and he saved a woman and her child. Jack then went to the funeral home to see the viewing and after trying to get Kate to go back to the island with him went back to the funeral home where he broke in and looked at Locke's body. Ben greeted him there and insisted that they work together to go back to the island which Jack agreed to do. Sayid got Hurley out of Santa Rosa and went on the run and so did Kate after lawyers wanted to test Aaron's blood. They wanted her to give him up because they knew that she was lying, she went to Sun to hide out and Sun understood that they didn't care about exposing the lie and just wanted Aaron. Sun suggested that she take care of them for her to keep Aaron, Kate rejected this. Sun insisted she was a woman that made difficult choices and that she didn't blame her for Jin's death. Sun tried to talk about Jack, but Kate rejected this. Sayid got injured and Hurley took him to Jack to receive medical attention as Ben tried to get Hurley to go with him, but he refused and got himself arrested to escape Ben. Ben then went to Eloise to discuss his progress. Sayid and Jack were attacked at the hospital, but Sayid tranquilised him and they met up with Ben to try and get Kate. Kate went to the lawyers and before she leaves, she asks Sun "would it make a difference if I knew she was alive".
Sun responded "you know she isn't, just like Jin".
Kate said "if she was and somehow came back, what would she do".
Sun reminded her "they aren't coming back, and we already did what was best to protect them, but Claire is most likely dead".
Kate responded "Charlie went after her".
Sun said "I know, he wanted me to protect Aaron while he looked for her, but the island is dangerous, and he probably died trying to save her".
Kate said "we don't know that they're dead".
Sun answered "it wouldn't matter because them still being alive on that island is being dead anyway".
Kate listened before asking "what would you do if you were in Claire's position, and you managed to find a way off the island and you found out what happened".
Sun answered "I would handle it and take care of the person that took my child".
Kate asked "could Claire be behind this".
Sun answered "no, she's dead like Jin, Sawyer, Juliet, Charlie, Shannon, and John".
Kate left really unsure about what would happen while Sun received a parcel with a gun and picture of Ben and Jack together. The lawyers knew and begged Kate to give him up because she had done this to herself. Jack and Kate meet up and follow the lawyer to his next client or they believe is the person who want to take Aaron and follow him to Carole Littleton. Jack talks to her to try and explain why they did what they did but after hearing that she doesn't know the truth about Aaron being her grandson leaves immediately and tells Kate about Carole not knowing and someone else is after Aaron. Jack and Kate met up with Sayid and Ben at the docks while Sun remained in the car with Aaron. Sun goes to try and kill Ben, but he stops her by telling her that Jin is alive and will prove it to her if she follows them to Eloise, who can show them the way back to the island. Kate and Sayid both leave not wanting to be part of this while Ben, Jack, and Sun go to Eloise's church to find a way back to the island. They enter the church and so does Desmond who after remembering something from his time on the island and knew that he had to find Eloise. All four followed Eloise to the Lamppost and learned about their path back to the island. Desmond left not wanting to go back and Jack had to get something of his father's to give to Locke. Jack got this from his grandfather and returned home to find Kate who had just given Aaron to Carole Littleton and told her truth about him. Kate slept with Jack that night and Jack went to put his dad's shoes on Locke before going to the airport and boarding Ajira 316. Ben before going to the airport attempted to kill Penelope Widmore in revenge for Charles Widmore killing Alex. Ben was stopped by Desmond who even though was shot managed to beat up Ben and flee, while he and his family fled. Sayid was also on that flight after being captured by Illana and they all flew back to the island. Jack realised the pilot was Lapidus and Lapidus quickly realised that they weren't going to Guam but the island. The plane flew until it hit turbulence and then flashed with a bright light. Jack woke up in a bamboo forest on the island and quickly saw both Hurley and Kate in the pool below. He dived in and got to them, they realised that it was only those three and decided to look around when they heard music and a Dharma van stopping by them. Two men got out in Dharma jumpsuits; and pointed guns at them. Jack, Kate, and Hurley realised that the men pointing guns at them were Jin and Charlie. Hurey said "Jin, Charlie". They both looked at each other and back to them in shock at seeing that their friends had returned to the island.
