Life ‘Supernatural’ stars announce next season will be the ‘big, grand finale of an institution’ March 22, 2019March 24, 2019Bill Keveney, USA TODAYComments Off on ‘Supernatural’ stars announce next season will be the ‘big, grand finale of an institution’ Stars Jensen Ackles, Jared Padalecki and Misha Collins took to social media to tell fans the long-running hit will end after next season, its 15th.