Joe Otterson TV ReporterTaylor Sheridan is stepping in as showrunner on his Paramount+ series “Lioness,” Variety has learned exclusively.Thomas Brady (“NOS4A2,” “Hell on Wheels”) was originally attached as showrunner and was present throughout the show’s writers’ room. But once the writers’ room wrapped, sources say creative differences led to the producers and Brady agreeing to part ways. Production on the show is slated to begin in September.Sheridan created “Lioness” under his expansive overall deal with Paramount.