Film, stage and television actor John Lithgow will portray Miami’s latest serial killer in SHOWTIME’s drama series 
“Dexter.” Lithgow will be featured in all 12 episodes of season four starting at the end of September.
Lithgow will play Walter Simmons, an unassuming, mild-mannered suburbanite who has been living a dual life as one of America’s most prolific and deadliest serial killers. Dubbed the “Trinity Killer” because of his proclivity to kill in three’s, he relocates to Miami after being tracked by F.B.I. Special Agent Frank Lundy (Keith Carradine). Brought on to assist in the investigation of Miami’s latest serial killer, Dexter Morgan (Michael C. Hall) becomes fascinated with “Trinity’s” unique killing methods and his ability to evade capture for almost three decades.
“Dexter” stars Michael C. Hall as a complicated and conflicted blood-spatter expert for the Miami police department who moonlights as a serial killer.
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