Watch Lost The Substitute Season 6 Episode 4 Online Stream. The previous episode What Kate does was a very great and interesting episode. Now, with the arrival of the new episode it will just make and add a great episode to a great season 6. The new episode is entitled as the Lost The Substitute Season 6 Episode 4. In this episode, Locke goes in search of aid to further help his cause. This episode will be shown and broadcast on Tuesday, February 16, 2010 9:00 PM-10:00 PM EST on ABC network. I just love this season. Watch Lost The Substitute Season 6 Episode 4 Online Stream.