Peter White Television EditorSex cult documentary series The Vow is coming back for a second season on HBO.The premium cable network has renewed the series, from directors and exec producers Jehane Noujaim and Karim Amer, to continue to the story of the NXIVM cult. Season 2 will air in 2021.It will be set against the backdrop of the federal trial of the United States against Keith Raniere and will offer a further view into Raniere’s innermost circle.