"The Book of Shadows" -- Morgan Brody (Elisabeth Harnois, left) speaks to teacher Rebecca Brewer (Myndy Crist, center) about a chemistry teacher's science experiment that when horribly wrong as her son Mason Brewer (Nathan Gamble) watches, on CSI: CRIME SCENE INVESTIGATION, Sunday, Oct. 19 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Photo: Sonja Flemming/CBS é2014 CBS Broadcasting, Inc. All Rights Reserved