We open with the rematch between Ken and Jim. The deciding question, a fairly easy one, is "how many months have 31 days?" Jim does not get the correct answer 7 and is eliminated; Ken gets the coveted 4th chair.
Robert as the #1 seed is given the pick of any of the the other 3 to play against. He picks Ken, who is worn out. The deciding question is which company invented the phrase "always a bridesmaind, never a bride." Ken covers all choices but Listerine, as he says there is no way that it could be that. Robert covers them all. The answer is Listerine's 1920s ad campaign, which add millions of dollars to their sales as they convinced woman that they must conquer bad breath to achieve happiness. Ken is gone.
Ashlee now play off against Julie. The crucial question on their last chip is the definition of MI5. Ashlee correctly says Military Intelligence while Julie goes for Majesty's Information. Julie is gone.
There is $1.69 million in the pot as Robert faces Ashlee for the total pot. The very first question decides it. Ashlee covers everything. Robert reacts to the question "Which weighs the most? gallon of water, gallon of crude oil, gallon of vegetable oil, all weigh the same" by leaving gallon of water uncovered. When the host plays with him about that by asking him what happens when crude oil is poured onto water, Robert realizes he may have made a crucial error. He has, as water is the answer and Ashlee wins. When her personal winnings are combined with the chips released from that question and the $1.69 million, she wins a total of $1.795 million.
I did my own little study of specfic gravity, the ratio of weight compared to water. Water is of course 1.0. Vegetable oil is 0.918. Crude oils vary, with a Texas crude at 0.876, a California crude at 0.918, and a Mexican crude at 0.976. Any way you look at it water is the heaviest, which I find surprising based on its extemely low viscosity.