?

Eko has a dream. Ana Lucia appears to him. She tells him to find the question mark. Eko takes Locke into the jungle. They climb up onto the Beechcraft.

From above, they see a huge question mark traced in the earth. Below it: a hatch. The Pearl station. An observation post. Screens. Cameras. Pneumatic tubes for sending reports.

A new orientation film. The Pearl occupants were watching the Swan occupants. The button? Maybe a psychological test. Locke cracks. His faith wavers. If the button is meaningless, everything he believed crumbles. Eko believes even stronger.