From CBS site:
ON THE NEXT SURVIVOR
An incident between a man and a woman becomes explosive, as tribe members react differently to facts and rumors.
One tribe wins the help of two Red Berets--the equivalent of our Green Berets--who show the tribe how to make the best of everything around their camp, possibly gaining an advantage as better survivalists.
At a Challenge, tensions escalate, prompting a fierce confrontation between the two tribes.