Live Together, Die Alone, Part 1 - S2-E23
Factual error: The prison Desmond is released from looks nothing like any British prison, let alone the British military prison (the "Glasshouse"), which is more of a training camp than a traditional prison. The guards wear no cap badges on their berets (all British service personnel wear cap badges) and their berets are worn almost vertically on their heads, whereas British berets are pulled hard to the right. The NCO who releases him is credited as a "master sergeant" in the episode credits - an American rank which has never been used in the British Army. (00:05:30)
Other mistake: When Jack and Rose talk the second time on the beach, they talk while it is cloudy and overcast. However, as Jack stands up to leave, he is brightly illuminated by sunshine.
Continuity mistake: After the submarine sinks, Jack lays Sawyer on the sand. In the last angle his head swaps from facing sideways to up.
Exodus (1) - S1-E23
Visible crew/equipment: At the moment they have just left on the raft, and the shot goes from the raft to the beach while it is in the water, you can see a boom mic pointing up in the air. This is quite clear for all to see.

Continuity mistake: In the replay of Sawyer meeting up with Jin, Jack, Kate, and Hurley, Sawyer takes his glasses off with his left hand. After the scene cuts to Kate and back, Sawyer is now taking his glasses off with his right hand. Not only that, but during that scene in the previous episode, he only took his glasses off with his right hand. (00:05:20)
Continuity mistake: At the end of the scene in the gym of the mental hospital when Hurley and Dave talk, in the background there is a guy sitting on the floor in a yoga-like position. His exact location changes between shots, as you can tell by the ground-lines. First he sits on the red line, next to where the blue and the yellow lines cross, then he sits about 5 feet further to the right, and finally he is back exactly on the same spot as in the beginning.

Continuity mistake: When John loses his voice, he uses a pad to communicate with Charlie. He writes "I need you to stand guard" in one scene and later shows the same message to Charlie. In the second scene, although it is supposed to be the same message, guard is misspelled "gaurd."
The Greater Good (a.k.a. Sides) - S1-E21
Continuity mistake: When Sayid speaks to CIA Agent Melissa Cole after Essam's death, in the first shot the body laden stretcher is wheeled to the vehicle and the back door is opened. When Agent Cole says, "Plane ticket and walking around money," in the background the stretcher is gone and the door is closed. But when Sayid asks, "What happens to his body?" the stretcher reappears as the body is being put into the open back door. (00:40:40)

Continuity mistake: When Sayid opens the lid of the compass to show Jack, in the close-up, all of Sayid's fingernails are short and trimmed, yet, in previous and following shots (including next episode "Special") some of his fingernails (such as the thumbs) are very long again. This occurs in many other episodes, such as "Exodus 2". (00:24:40)
Through The Looking Glass (2) - S3-E23
Factual error: When Charlie is in the small communications room of the underwater base, after the grenade blows out the window and the water is rushing in. The water would only come up to the top of the window, anything above that would be an air pocket and water would not go any higher, yet it got completely filled over Charlie's head. (00:30:00)
Continuity mistake: Season 6 Episode 3 "What Kate Does". When Sawyer is about to leave the temple he is holding a SIG pistol. When he opens the door and raises the gun again it has changed into a Glock.
Continuity mistake: 6-01-02 - LAX: Before Hurley grabs a gun, while Sayid is lying down, his head position keeps swapping from straight in the close-ups to tilted to the right in the wide angle.
Continuity mistake: Season 5, episode 8 'LaFleur': When the two Dharma members wake up LaFleur, Sawyer wears a white t-shirt, but when he takes his Dharma overalls his t-shirt turns green.
Continuity mistake: Episode 3-17: Juliet is shown crawling out of the sub. You see a side street where she is crawling over an uneven area to a dock about four feet away from her. When the shot pulls back, the dock is nowhere near her - she was crawling on a different dock.
Continuity mistake: Throughout the show the grime and dirt on people keeps disappearing and reappearing instantly.
Continuity mistake: In season 2, episode 5, Jin and Mr. Eko are searching for Michael. Jin gets attacked by a boar and rolls down a hill to find the corpse of Goodwin. In this scene they are in the middle of the jungle. Now two episodes later, when Ana-Lucia confronts Goodwin they are on top of a mountain without trees surrounding them. This is confirmed in Juliet's flashbacks in later seasons when Ben takes her to see Goodwin's body.
Continuity mistake: After picking up Eddy the hitchhiker, John and his passenger can be seen driving through a compound. As they drive through the compound, a passenger can be seen in John's pick-up truck. The scene just before they arrive at the sweat lodge, there is no passenger. Once they arrive at the sweat lodge, a passenger exits the pick-up truck. (00:16:25)
Continuity mistake: Lost 6-01-02 - LAX: When Sawyer rescues Juliet, her hand moves next to her face. Half a second later it's away.
Character mistake: Throughout the whole series Jin and Sun refer to each other as "yobo." The subtitles continually translate "yobo" as either "Jin" or "Sun" which is incorrect. "Yobo" is Korea's version of "dear" or "sweetheart."
Chosen answer: None of the main characters died in the plane crash. Many died on the island after the crash (Jack, Charlie, Sun, Jin, Daniel, Juliet, others), some lived on the island for an apparently long time after the crash (Hurley, Ben, Bernard, Rose) but some lived lives off the island after the crash (Sawyer, Kate, Claire, Miles, Aplert, and Lapidus). Remember that Christian tells Jack that "time has no meaning here," (in Purgatory). When everyone meets at the church, they are at the end of their lives however long that may have been and will now "move on" together. They look like they did on the island because that is the way they best remember each other.
Guy
That has to be the clearest explanation of the ending I've ever read.
Ssiscool ★