Entertainment TV Read Time : 2 Minutes Animated ‘Gremlins: Secrets of the Mogwai’ Prequel Series Set For Warnermedia Streaming July 1, 2019July 1, 2019 Hoob In Gremlins: Secrets of the Mogwai, we travel back to 1920s Shanghai to reveal the story of how 10-year-old Sam Wing met the young Gizmo.