Before there was a Mystery, Inc., Daphne Blake (Sarah Jeffery) and Velma Dinkley (Sarah Gilman) were dealing with an online friendship fitfully crossing into the real world when Daphne unexpectedly transferred to Velma’s high school. Can the (very) amateur sleuths crack the riddle of why the student body’s best and brightest are turning into burnt-out zombies? Fun live-action "Scooby-Doo" prequel adventure also stars Brian Stepanek, Nadine Ellis, Vanessa Marano, Courtney Dietz. 72 min. Widescreen; Soundtrack: English Dolby Digital 5.1. Two-disc set.