Suspicion is an important element of the movie-watching experience. We engage with the plot by developing reasoned pre-conclusions about how events will unfold. We make assumptions before the truth is revealed. But for Lina Aysgarth (Joan Fontaine), a wealthy ingenue gripped by a growing fear that her playboy husband Johnnie (Cary Grant) is planning to murder her for her life insurance policy, suspicion is synonymous more with the terror of presumed inevitability than with the anticipation of knowing. Suspicion, however, cautions us to be ever mindful of all eventualities when solving a case.