Crying holds a privileged place in conversations around emotions as an expression of authentic feeling. And yet, tears are ambiguous: they might signal the most positive and negative of affects; they might present a sincere revelation of self or be simulated to manipulate others. Unsurprisingly, tears figure prominently on stage and on screen, where actors have experimented with the mechanics of making tears. Cue Tears: On the Act of Crying uses tears as a prism through which to see some of the foundational problems and paradoxes of acting and spectatorship anew, including matters of authenticity and sincerity, the ethics of the witness, the interaction between a speech act and its affective force, liveness and documentation. Across seven semi-autonomous essays, Cue Tears looks at the mechanisms of tear production, internal and external techniques that actors use to weep, and the effects of tears in performance situations on the stage, in the gallery, and in the classroom. The writing moves with a light touch between theory and criticism of a broad range of instances from literature, theater, performance art, visual art, and cinema, while also embracing a strong autobiographical and personal slant. Author Daniel Sack’s father was a biochemist who studied tears and collected his son’s tears for research during his childhood. These “reflex tears” were produced as a physical response to irritation—an eye stretched past the point of blinking, a cotton swab up the nose. This childhood occupation coincided with his first years taking acting classes, trying to learn how to cry “emotional tears” onstage through psychological stimulation and the recollection of memory. Cue Tears investigates these memories and methods, finding that tears both shore up and dissolve distinctions between truth and artifice, emotional and physical, private and public, sad and humorous.