Dexter universe for the show’s forthcoming revival.The actor originally starred in the show’s fourth season, and won an Emmy award for his performance as “Trinity Killer” Arthur Mitchell.There’s no word yet on what form Lithgow’s return will take, as Mitchell was killed off by Dexter Morgan in the season four finale ‘The Getaway’ in 2009.Deadline reports that Lithgow is only expected to film on set “for about a day or so”, and that the 10-episode series’ showrunner Clyde Phillips has “concocted