Agents of S.H.I.E.L.D. season 4 begins airing on ABC in Fall 2016.
Source: Agents of S.H.I.E.L.D.
Hellfire first joined Agents of S.H.I.E.L.D. in season 3 as an old Inhuman acquaintance of Lincoln’s (Luke Mitchell) who had been denied the process of Terrigenesis by Jiaying (Dichen Lachman).
Last year, the show announced the Secret Warriors storyline for season 3 ahead of SDCC, then led a tie-in promotion for the Agents of S.H.I.E.L.D. Secret Warriors during the convention itself.