The Apprentice Season 10 Episode 4 (The Apprentice s10e04) aired on Thursday, October 7th 2010 at 10:00 pm via NBC Network.
Here is summary for The Apprentice Season 10 Episode 4 :

Trump tasks the teams with creating a video for Popcorn Indiana, with the intention of it going viral on the internet. One team loses a member to a dental emergency, and violence in their video causes another teammate concern. On the other side, one team member is ostracized by the rest. In the end, one team hits the mark, with the other team left to fight it out in the boardroom, where another candidate is sent packing.