Synesthesia may be a brain disorder, but those afflicted rarely complain about the symptoms. This program examines the unusual condition, outlines its appearances in medical history, and describes new theories and speculation surrounding it. Identifying well-known artists, writers, and musicians who may have experienced “crossed signals” in their sensory perceptions—including Wassily Kandinsky and Miles Davis—the video presents the possibility that tasting sounds or seeing numbers in color may actually occur to a lesser degree in most people, and that synesthesia could even have driven the evolution of language. Original BBCW broadcast title: Derek Tastes of Earwax. (50 minutes)