The Best Serial Killer TV Shows on Free Services

What it's about: Dexter Morgan, a blood spatter pattern analyst for the Miami Metro Police also leads a secret life as a serial killer, hunting down criminals who have slipped through the cracks of justice.

Where to Watch: 2 episodes (2%) are available to watch free online (Showtime & ABC News). 96 episodes (100%) are available to stream on a popular subscription service (Prime Video, fuboTV & Showtime). 96 episodes (100%) are available to stream on a popular TV everywhere service (Showtime). 96 episodes (100%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: The exploits of FBI Special Agents Fox Mulder and Dana Scully who investigate X-Files: marginalized, unsolved cases involving paranormal phenomena. Mulder believes in the existence of aliens and the paranormal while Scully, a skeptic, is assigned to make scientific analyses of Mulder's discoveries that debunk Mulder's work and thus return him to mainstream cases.

Where to Watch: 3 episodes (1%) are available to watch free online (FOX). 218 episodes (100%) are available to stream on a popular subscription service (Hulu & Philo). 20 episodes (9%) are available to stream on a TV everywhere service (BBC America). 219 episodes (100%) are available to rent or buy from $1.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: When the Police Service of Northern Ireland are unable to close a case after 28 days, Detective Superintendent Stella Gibson of the Metropolitan Police Service is called in to review the case. Under her new leadership, the local detectives must track down and stop a serial killer who is terrorising the city of Belfast.

Where to Watch: 29 episodes (100%) are available to watch free online (Tubi & Peacock). 24 episodes (83%) are available to stream on a popular subscription service (Prime Video, BritBox, Hoopla & 1 other). 18 episodes (62%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Light Yagami is an ace student with great prospects—and he’s bored out of his mind. But all that changes when he finds the Death Note, a notebook dropped by a rogue Shinigami death god. Any human whose name is written in the notebook dies, and Light has vowed to use the power of the Death Note to rid the world of evil. But will Light succeed in his noble goal, or will the Death Note turn him into the very thing he fights against?

Where to Watch: 37 episodes (100%) are available to watch free online (Tubi, PlutoTV, Vudu & 1 other). 37 episodes (100%) are available to stream on a popular subscription service (Netflix, HBO MAX, Hulu & 1 other). 37 episodes (100%) are available to rent or buy from $1.99 on 3 services (Google Play, Vudu & YouTube).

What it's about: A demented serial killer taunts a retired police detective with a series of lurid letters and emails, forcing the ex-cop to undertake a private, and potentially felonious, crusade to bring the killer to justice before he can strike again. Based on the bestselling novel by Stephen King.

Where to Watch: 10 episodes (33%) are available to watch free online (Peacock). 20 episodes (67%) are available to stream on a popular subscription service (Peacock Premium & Hoopla). 20 episodes (67%) are available to rent or buy from $1.99 on 1 service (Vudu).

What it's about: The son of a notorious serial killer becomes an acclaimed criminal psychologist who uses his unique insight into how killers think to help the NYPD.

Where to Watch: 4 episodes (18%) are available to watch free online (FOX). 21 episodes (95%) are available to stream on a popular subscription service (Hulu, fuboTV & TVision). 1 episodes (5%) are available to stream on a TV everywhere service (FOX). 22 episodes (100%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play & 2 others).

What it's about: Satoru Fujinuma is a struggling manga artist who has the ability to turn back time and prevent deaths. When his mother is killed he turns back time to solve the mystery, but ends up back in elementary school, just before the disappearance of his classmate Kayo.

Where to Watch: 12 episodes (100%) are available to watch free online (Crunchyroll). 12 episodes (100%) are available to stream on a popular subscription service (Netflix, HBO MAX & 2 others).

What it's about: A group of family and friends travels to a secluded island for a destination wedding. They've come to laugh... to love... and, though they don't know it... to die. As the wedding festivities begin, friendships are tested and secrets exposed as a murderer claims victims, one by one, transforming the wedding week of fun and celebration into a terrifying struggle for survival.

Where to Watch: 13 episodes (100%) are available to watch free online (PlutoTV). 13 episodes (100%) are available to stream on a popular subscription service (Prime Video). 13 episodes (100%) are available to rent or buy from $0.99 on 3 services (iTunes, Prime Video & Vudu).

What it's about: A unique look inside the mind of an infamous serial killer with this cinematic self-portrait crafted from statements made by Ted Bundy, including present-day interviews, archival footage and audio recordings from death row.

Where to Watch: 8 episodes (100%) are available to watch free online (Tubi & IMDb TV).

What it's about: The adventures of young H.G. Wells and his time machine.

Where to Watch: 12 episodes (86%) are available to watch free online (CW Seed). 1 episodes (7%) are available to stream on a popular subscription service (Hulu). 5 episodes (36%) are available to rent or buy from $1.99 on 4 services (Google Play, Prime Video & 2 others).

What it's about: Everything is not what it seems in Trinity, South Carolina. Sheriff Lucas Buck develops a sinister interest in Caleb. Caleb's cousin Gail tries to protect him, but that's complicated since she has feelings for Sheriff Buck. And Caleb's dead sister, Merlyn, returns as an angel, warning him that Buck is an incarnation of evil - and may not be human.

Where to Watch: 18 episodes (51%) are available to watch free online (PlutoTV & NBC). 17 episodes (49%) are available to stream on a popular subscription service (Hulu). 22 episodes (63%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Hannah plays DI Jack Cloth, who is called in to investigate an apparent series of serial killings alongside his new partner, DC Anne Oldman, described as a "plucky, no-nonsense sidekick". Playing with the cliches and conventions of British police dramas, subplots include Cloth dealing with visions of his dead wife and the bisexual DC Oldman coming to grips with her feelings for both her female fiancee and Cloth.

Where to Watch: 3 episodes (50%) are available to watch free online (Plex). 3 episodes (50%) are available to stream on a popular subscription service (Prime Video).

What it's about: Follow documentarians Joshua Zeman and Rachel Mills as they investigate one of the most bizarre unsolved serial killer cases of our time – the deaths of ten sex workers discovered on Gilgo Beach, Long Island.

Where to Watch: 8 episodes (100%) are available to watch free online (Tubi). 8 episodes (100%) are available to stream on a TV everywhere service (A&E). 8 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Detective Mike Sweeney has just moved with his wife and daughters from Toronto to his hometown of Durham County after the death of his partner. Hoping to escape the violent world of big city police work, Mike falls into a suburban world besieged by crime, abuse and murder.

Where to Watch: 18 episodes (100%) are available to watch free online (Tubi & IMDb TV). 18 episodes (100%) are available to stream on a popular subscription service (Prime Video).

What it's about: Story about an unexpected plane crash that causes a widespread panic in South Korea due to the disappearance of nine people, including some influential figures in the entertainment industry. Seo Joon O used to be a popular singer, but he isn't popular anymore. Now, he works as a reporter for a TV entertainment show. He and his stylist Ra Bong-Hee land on a deserted island.

Where to Watch: 16 episodes (100%) are available to watch free online (Tubi).