While there have been plenty of disappointing, messy sci-fi movies over the years, it can feel even more tragic when there’s a truly fantastic performance buried amid a lackluster film. As a genre, it can be easy to get things wrong in science fiction, as overblown budgets, terrible CGI, poor storytelling, or misguided adaptations frustrate and annoy viewers and can even have damaging effects on beloved franchises. Yet, just because a movie is messy, that doesn’t mean that everything about it is bad, and some all-time great actors have done some of their best work in divisive films.