Portrayals of female scientists in science fiction tend to be rare and often distorted. Our research investigates the social media discourse related to public perceptions of the portrayals of scientists in science fiction. We explore the following questions: How does audience discourse about a female scientist protagonist in a science fiction film compare with that about a male scientist in a comparable movie? And, what fraction of discourse in each case is dedicated to (a) comments on physical appearance and (b) (...) incredulity that the character is a scientist? Using automated nonparametric sentiment analysis software that employs an intelligent algorithm informed by human coding, we analyze Twitter discourse around the release of two summer 2011 science fiction blockbusters with scientists in lead roles: Thor and Rise of the Planet of the Apes. Although scholars have pointed to sexualized portrayals of women scientists in popular media, we found relatively few mentions of the attractiveness of an admittedly attractive female scientist. Additionally, audience discourse was not centered on the implausibility of the female scientist. This is particularly meaningful when combined with previous research showing that strong women in lead roles do not decrease profitability of science fiction films. (shrink)