Dexter’s (Michael C. Hall) is in shock when Arthur Mitchell (John Lithgow), known as the "Trinity Killer", walks into Miami Metro. After months of Dexter spying on him under an alias, Arthur shows up by confronting Dexter in his own office. Season 4 Episode 11: Hello, Dexter Morgan. Stream Dexter on the Paramount+ Premium Plan. #Showtime #TrinityKiller #Dexter #Thriller The stars have aligned. Paramount+ is the streaming home of SHOWTIME. Try Paramount+ for free today: prmntpl.us/PPlusYT Subscribe to the SHOWTIME YouTube channel: goo.gl/esCMib Subscribe to the Paramount+ YouTube Channel: @paramountplus About Dexter: Dexter Morgan, America's favorite serial killer, spends his days solving crimes and his nights committing them. Get SHOWTIME merchandise now: s.sho.com/33FGC1D Follow SHOWTIME on Facebook: facebook.com/showtime Follow SHOWTIME on Instagram: instagram.com/showtime Follow SHOWTIME on TikTok: tiktok.com/@showti...