Is this the last episode before the finale?
There are 4 more:
Season 6, Episode 15 Airs: 5/11/2010 - Across The Sea (Locke’s intentions are finally brought to light. )
Season 6, Episode 16 Airs: 5/18/2010 - What They Died For (TBD)
Season 6, Episode 17 Airs: 5/23/2010 - The End (1) (TBD)
Season 6, Episode 18 Airs: 5/23/2010 - The End (2) (TBD)