Supernatural Wayward Sisters spinoff officially casts its core cast According to Deadline: ‘Wayward Sisters’: The CW Spinoff Adds ‘Supernatural’ Trio & Newcomer To Cast BURBANK, Calif. (July 23, 2017) — Warner Bros. Television’s long-running, fan-favorite series Supernatural (Thursdays 8/7c The CW) is “carrying on” with the confirmed casting for a potential new Wayward Sisters series, set in…