The official Japanese website for the anime adaptation project based on Kazuma Kamachi’s action fantasy light novel series A Certain Magical Index announced today on August 6 that its highly anticipated TV anime third season, A Certain Magical INDEX III is set to premiere on AT-X, Tokyo MX and BS 11 on October 5, 2018, then on MBS one day later. second season with another 24 episodes followed from October 2010 to April 2011.