Lockdown

The hatch locks down. Without warning. Blast doors descend. Locke is trapped. Alone. Under a door weighing several tons crushing his leg.

He calls Henry Gale for help. Henry crawls through the ventilation ducts. He reaches the computer. He enters the code. The timer resets. But Locke saw nothing. What did Henry do during those minutes out of sight?

Under black light, a map appears on the blast door. Hand-drawn. DHARMA stations. Annotations. Connections. An entire network. Locke glimpses it for a split second before the lights return. The island has secrets. And someone has mapped them.