Joe Otterson TV ReporterSamantha Morton is returning to the world of “The Walking Dead,” with the actress set to appear in the upcoming anthology series “Tales of the Walking Dead” at AMC.Morton will star in an episode of “Tales of the Walking Dead” as Alpha, the villainous character she played in Seasons 9 and 10 of the hit zombie apocalypse series. Alpha was the leader of The Whisperers, a group that survived by donning zombie skin in order to move freely among the undead and then attacking other living humans for resources.