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The hatch suddenly goes into lockdown and traps Locke in with Henry Gale.
FlashbackLocke and Helen's relationship is going well, and we see that Locke is secretly planning to propose to her. When Locke sees his father's name in the obituaries, however, he decides to attend his funeral. He and Helen are the only people at the ceremony. Beside his father's casket, Locke tells his father that he forgives him. During the funeral, Locke notices two suspicious men standing off to the side, and a car that seems to be stalling, only to leave at the end of the service.
Locke now works as a home inspector, and one day as he is finishing one of his jobs, he notices the same car that had been at his father's funeral. When he approaches, the window rolls down to reveal Cooper, Locke's father, alive and well. Locke is stunned. The two go to a bar and Cooper makes an appeal to Locke, saying that what he did to him wasn't right. He then tells Locke that he faked his own death to escape from the two men at the funeral service, whom he conned $700,000 dollars from. He slides Locke a safety deposit key, offering him a cut of the money if he'll help him withdraw the cash.
Despite his father saying he would understand if he didn't want to go through with it, Locke withdraws the $700,000 from the safety deposit box. Later, when he gets home, he finds the two men from the funeral service in his house. The men seem to suspect that Cooper may have faked his own death, and ask whether Locke has seen him. Locke denies this, and the men leave. Helen asks Locke if he had lied to the men; Locke says that he did not, and the two embrace.
The next day, Locke goes to the hotel where his father is staying and delivers the cash. When Cooper offers him $200,000, Locke says he didn't do it for the money. Just then, a knock on the door turns out to be Helen; she had tailed Locke. She slaps Cooper in the face, asking him how he could do such a thing, then exchanges a look with a speechless Locke. She turns and leaves the door, and Locke rushes after her, desperately fumbling to explain. Helen has tears in her eyes as she turns to Locke "You looked me right in the eye and you lied to me! You made your choice, John. You need his love more than mine." Locke denies this, saying that he loves her, needs her in his life. He gets down on one knee and pulls out a ring, asking her to marry him. Helen looks extremely pained, then shakes her head, gets in her car, and drives off. Across the parking lot, Cooper stares at his son for a moment before getting in a cab and departing, leaving Locke shattered and alone.
On the Island Locke hears a strange staticy voice coming from the speakers on the wall of the hatch, and upon closer inspection he realizes it is a female voice reading a countdown. When the countdown reaches zero, the hatch starts rumbling and thick steel walls come down, blocking off the dining area. Locke manages to slide a thin piece of metal under one of the walls just in time, but cannot lift it on his own. Henry says that he will help, on the condition that Locke protect him from the other survivors should they try to hurt him. Locke opens the hatch and gives Henry a piercing stare, asking him once more who he is. Henry returns the gaze and replies, "My name is Henry Gale. I'm from Minnesota. And I crashed on this island just like you." Locke nods his head and lets him out.
Together, Locke and Henry manage to pry open the steel wall a fraction and jam it with a rusty toolbox. Locke tries to slide under the gap when the toolbox gives away and the wall pins his leg to the floor. Henry quickly piles some weights under the wall to keep the pressure off the now bloody leg, but Locke cannot move. Henry suggest that they wait for help, but Locke says there is no time, that the numbers must be entered into the computer soon. Locke tells Henry to crawl through the grate in the ceiling to get to the computer, and Henry agrees. However, he has a hard time getting through, and by the time he has managed to pull himself into the vents, the 1-minute warning alarm has already begun.
Locke is panicked, and calls out to Henry, asking where he is. He gets no reply. Suddenly, there is a loud rumbling and all the lights go out briefly. An ultraviolet light comes on, and the room is bathed in an eerie blue color. Locke looks up at the metal wall before him in amazement--there is a strange, hidden map of some sort there. The map only remains for a moment before all the lights come back on and the metal walls rise.
Locke crawls with his injured leg into the computer room, and finds that Henry has properly entered the numbers; the timer is counting down normally. Henry enters the room and helps Locke limp to the dining room. Locke thanks him for not leaving him alone. As the two begin to discuss what could have caused the lockdown, Ana Lucia and the others return to the hatch with Jack and Kate. Sayid has a gun out, and Jack pushes Henry against a wall. Locke begins to defend Henry, saying that he let him out and that Henry had helped him. Henry asks Sayid if they found his hot air balloon, and Sayid replies that they did; they found the grave and the balloon just as Henry described them. But Sayid, not being convinced, says that he had dug up the grave, and inside he found not a woman but a man. Sayid holds out an identification card with a picture of a unknown man and the name "Henry Gale" inscribed beneath it.