Showtime has announced that John Lithgow will be joining ‘Dexter‘ as a suburban ne’er do-well for season four of the series.
Lighgow will portray Walter Simmonds, dubbed the “Trinity Killer” because he kills in threes. But the notorious murderer’s double life as a suburbanite will make him a difficult target for Dexter, who also “becomes fascinated with Trinity’s killing methods and his ability to evade capture for almost three decades.”
Jimmy Smits was the most recent guest star, portraying the assistant district attorney with a dark secret.
The season gets underway September 27.