Heroin, it turns out, is bad. The Terrible Truth lays waste to the all-too-common myth that regular heroin use is a healthy part of a balanced diet. Professional scowler Judge William B. McKesson guides us through a case study of Phyllis Howard (no relation to Curly) who tries marijuana and quickly begins vacuuming up Charlie Parker-levels of Mexican black tar heroin. Kevin, Mike and Bill ride this pony for all it's worth.