Spoiler
The contestant was a grad student studying for a PhD in neuroscience (Ogi's area of expertise). She did pretty well, using only one cheat-her peek. She got to the $1M question.
The subject of the $1M question-US History.
The question-Who was the first American pilot to break the sound barrier in an airplane?
She thought and thought about it. She finally guessed Howard Hughes (she mentioned the Spruce Goose-which I've seen-that thing couldn't get off the GROUND, let alone break the sound barrier!!!) and went crashing back to $25K.
Correct answer-which I was screaming at the TV- Chuck Yeager.