the marshall told Locke that "the pilot and some woman took off in the boats in the middle of the night and didn't tell anyone." And when Sawyer, Juliet, Dan, Miles, and Charlotte went back to the camp and it looked like it had been ransacked,......they saw that boat, which had an ajira airways water bottle in it. so obviously they were in the future when that happened because that was probably the boat frank and "that woman" were in. But i'm still not sure who was shooting them when they were trying to get to the other side of the island, to go to the orchid. and who was the woman who went with him,....??? because all of the oceanic 6 dissapeared from the flash. so it has to be somebody who he knows.......so the only thing i can think of is that its penny,..... but i don't think penny would leave charlie.