The CW Announces Premiere Dates For ‘Supernatural’ And ‘Riverdale’ by Kelli Marchman McNeely | Jun 11, 2017 | TV The CW is already gearing up for the fall season and has now announced the premiere dates for Supernatural’s twelfth season and Riverdale’s second. Supernatural’s 13th season will premiere on its new night, Thursday October 21, 2017 at...