Penny left this episode and I'm glad after she betrayed Jake. Sook Jai really fell apart as a tribe and surely Jake will be the next to go. The Chuay Gahn alliance has held firm throughout the series but I think they'll be voted out in this order: Jan, Clay, Ted, Helen and then Brian as the sole survivor.
The reward challenge was an obstacle course which was harsh on Jake as he didn't get the chance to compete. Brian won thanks to Clay's assistance and in return, Brian picked Clay to go with him on the reward. Immunity required a general knowledge of Thailand which Helen aced although I don't think there was ever a doubt that she would be staying.