Lost, Season Five

Dan (staring at the hatch crater):
Is this the hatch?

Sawyer:
It was. Blown up, just like we left it.

Dan:
Okay. So when we are now... It's now after you and your people crashed on the island.

Sawyer:
You sayin' our camp is back on the beach again?

Dan:
It's possible, yeah.

Sawyer:
Good. I'm going back.

Dan:
Hey. No, no. (stoping him) It's pointless.

Sawyer:
More pointless than staring at a hole in the ground?

Dan:
We don't know when the next flash is coming. By the time you get back to the beach, the camp could be gone again.

Sawyer:
Yeah. But what if it ain't? Hell, what if the helicopter hasn't even taken off yet?

Juliet:
We could warn them. Stop them from ever flying to that boat.

Dan:
That is not the way it works.

Sawyer:
Who says?

Dan:
You cannot change anything. You can't. Even if you tried to, it wouldn't work.

Sawyer:
Why not?

Dan:
Time it's like a street, all right? We can move forward on that street, we can move in reverse, but we cannot ever create a new street. If we try to do anything different, we will fail every time. Whatever happened, happened.