Dexter may have run for eight seasons and a limited revival, but many fans still consider season 4 to be the true series finale. While other TV shows like Game of Thrones and How I Met Your Mother would later join the club of controversial series endings, the season 8 finale of Dexter remains one of the most divisive conclusions of all time. The hit series then returned for a limited run in 2021’s Dexter: New Blood reboot, which – although seemingly impossible – produced an even more controversial finale than the original.
Dexter season 4 saw the title serial killer take on his worst foe yet. Beginning with the return of FBI Agent Frank Lundy, Dexter Morgan and Miami Metro PD spent season 4 tracking down the Trinity Killer (AKA Arthur Mitchell), who had been killing in cycles for over 30 years. When Dexter discovered the Trinity Killer’s identity, he befriended Arthur under the alias Kyle Butler, with the title killer even briefly looking up to Trinity as a mentor for how to balance murder and family life. However, the truth behind the mask of John Lithgow's Arthur Mitchell soon came to light, as Dexter realized that not only was Arthur’s family at risk, but also his own wife and children. After waiting too long to take action, Dexter season 4 ended with the Bay Harbor Butcher finally killing Trinity, only to come home to his infant son sitting in a pool of his wife’s blood.
Related: How New Blood’s Ending Compares To The Original Dexter Finale Plans
With Dexter's captivating personal journey as a family man, heightened suspense as he befriends then antagonizes Trinity, and devastating finale, Dexter season 4 is considered the height of the series. While some contend that Dexter season 1 also had a perfect ending, the
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