Feeling rebuffed by a former ally, one Survivor hatches a plan and enlists the support of unlikely new allies. Having won a Reward Challenge, a tribe member becomes overly excited, shouting and rolling on the ground, while others stew bitterly in their loss. One Survivor overindulges in wine and shows a new side of their personality.
From the looks of this preview, I would have to guess that Helen wins the Reward Challenge (which is the car tonite). That sounds like her personality "shouting and rolling on the ground." Doesn't that sound like Helen.
I also think that Helen is the one with the plan to get support from unlikely tribe memebers, but I am not as sure about this as I am about the car. However, I could be wrong about both.