S05E07: 'The Life and Death of Jeremy Bentham'

This tantalising episode hovers back and forth in time as the legendary Locke takes centre stage. Here is what ensues:

John Locke is back on the island in a suit after the crash of flight 316.

Two of the passengers - Caesar and Ilana - come to the fore.

Locke is visited by Charles Widmore.

A wheelchair-bound Locke meets up with Walt.

Matthew Abaddon is back.

An old girlfriend of Locke's has died.

Widmore explains how he and Ben Linus fell out on the island.