IIRC it was the final season… Season 8 , that never got dubbed. The Final Act… OAV might have been for all I know. It seems like Google's suggesting that this "Final Act" might me the same thing as Season 8. All I know, is most of the Anime Sites I use to watch Anime on XBMC/Kodi only get up to Season 7 before becoming Sub ONLY! My understanding at the time was that Cartoon Network dropped Inuyasha at that time, and was then never dubbed.