Locke & Widmore face off at the sonic fence on Hydra Island

Locke reaches Hydra Island alone in a canoe and immediately sees the portable sonic fence set up all the way down the beach. Seamus and other armed members of Widmore's group take shots and Locke and tell him not to move. Locke says that he comes in peace.

They walk up the beach towards the Ajira plane with Locke staying on the ocean side of the fence. Charles Widmore emerges and Locke knows who he is. Widmore reveals that he knows that Locke is obviously not really Locke. He says other than that, all he knows is "myth, ghost stories, and jungle noises." Locke points out that Widmore knows more that he's letting on since he knew to put up the sonic fence pylons.

Widmore denies that he took Jin, causing Locke to repeat Widmore's words from season 5. Locke says "A wise man once said that war was coming to this island, I think it just got here."

So how much does Widmore actually know about the black smoke/Man in Black/Locke? Clearly he knows more than he's letting on, but how much is that? Something tells me this war is going to have a few casualties.

Sawyer revisits the Hydra station, finds Kate's old dress

Sawyer reaches the Hydra island in the canoe and heads to the abandoned Hydra station. He somberly revisits the polar bear cages where he and Kate spent so much time in the first part of season 3. He finds the flowered dress that Ben gave Kate to wear that prior to that belonged to Alex.

Locke tells Sawyer he's the smoke monster, sends him to Hydra island

As Locke leads his group across the island, he tells them that they are going to stop and make camp in a clearing for a few days. Sawyer objects to this in front of everyone, wanting to know why they're not leaving the island.

Locke and Sawyer go to talk privately where Locke reveals to Sawyer that he's the black smoke and that he killed the people at the temple when they chose to stay. He says that the people who stayed were convinced that they're protecting the island from the smoke (Locke), so it is either "kill or be killed."

Locke then leads Sawyer to the beach where there's an outrigger canoe sitting. He tells Sawyer to go to the Hydra island and do some recon on the remaining Ajira 316 passengers that he claims may include people that want to do them harm. He says that the plan is to fly the Ajira plane away from the island.

So is any of what Locke is saying true? We know a lot of what he said is a lie, but is the Ajira plane really part of his plan?