This past weekend I spent too many hours on Netflix watching Lie to Me, the Fox television drama that ran from 2009 to 2011. It’s a crime procedural (my favorite genre) about Dr. Cal Lightman, a psychologist who can spot liars by analyzing their body language and super-fast facial ticks, called microexpressions.

On the show, Lightman’s obsession with faces stems from a decades-old film of his mother recorded by her therapist. She had been institutionalized for depression, but on the film, she tells the therapist how good she feels after treatment, and how she longs to see her children. The therapist is convinced, allows her to go home, and she promptly commits suicide. After years of analyzing the