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: 1 episodes (1%) are available to watch free online (Showtime). 96 episodes (100%) are available to stream on a popular subscription service (Netflix, Showtime & fuboTV). 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 5 services (iTunes, Google Play & 3 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 & fuboTV). 19 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: Spoiled billionaire playboy Oliver Queen is missing and presumed dead when his yacht is lost at sea. He returns five years later a changed man, determined to clean up the city as a hooded vigilante armed with a bow.

Where to Watch: 5 episodes (3%) are available to watch free online (The CW). 171 episodes (100%) are available to stream on a popular subscription service (Netflix). 170 episodes (99%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A modern-day drama about a crime-solving duo that cracks the NYPD's most impossible cases. Following his fall from grace in London and a stint in rehab, eccentric Sherlock escapes to Manhattan where his wealthy father forces him to live with his worst nightmare - a sober companion, Dr. Watson.

Where to Watch: 11 episodes (7%) are available to watch free online (CBS). 154 episodes (99%) are available to stream on a popular subscription service (Hulu & CBS All Access). 154 episodes (99%) 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 (Crunchyroll, Tubi & Vudu). 37 episodes (100%) are available to stream on a popular subscription service (Netflix & Hulu). 37 episodes (100%) are available to rent or buy from $1.99 on 3 services (Google Play, Vudu & YouTube).

What it's about: An elite team of FBI profilers analyze the country's most twisted criminal minds, anticipating their next moves before they strike again. The Behavioral Analysis Unit's most experienced agent is David Rossi, a founding member of the BAU who returns to help the team solve new cases.

Where to Watch: 5 episodes (2%) are available to watch free online (CBS). 287 episodes (88%) are available to stream on a popular subscription service (Netflix & CBS All Access). 322 episodes (99%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Notorious serial killer Joe Carroll, after being found guilty of murdering 14 female students on the Virginia college campus where he taught literature, escapes from death row. The FBI calls former agent Ryan Hardy to consult on the case, as he was the one responsible for Carroll’s capture in 2003. Ryan, working closely with an FBI team, including Mike Weston and FBI Specialist Debra Parker, piece together the ever-growing web of murders orchestrated by the devious Carroll.

Where to Watch: 45 episodes (100%) are available to watch free online (IMDb TV). 45 episodes (100%) are available to rent or buy from $1.99 on 7 services (iTunes, Google Play & 5 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 & Hulu).

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). 8 episodes (100%) are available to stream on a popular subscription service (Prime Video).

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: 5 episodes (26%) are available to watch free online (FOX). 18 episodes (95%) are available to stream on a popular subscription service (Hulu & fuboTV). 13 episodes (68%) are available to stream on a TV everywhere service (FOX). 19 episodes (100%) are available to rent or buy from $1.99 on 3 services (Google Play, Vudu & YouTube).

What it's about: American Gothic is an American horror series created by Shaun Cassidy and executive produced by Sam Raimi. The show first aired on CBS on September 22, 1995, and was canceled after a single season on July 11, 1996.

Where to Watch: 5 episodes (23%) are available to watch free online (NBC). 17 episodes (77%) are available to stream on a popular subscription service (Hulu). 22 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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: 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). 18 episodes (100%) are available to stream on a popular subscription service (Prime Video). 18 episodes (100%) are available to rent or buy from $1.99 on 1 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 (IMDb TV). 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: A look at the hunt for California's Zodiac Killer, who murdered at least five people in the San Francisco Bay Area in the late 1960s and early '70s.

Where to Watch: 5 episodes (100%) are available to watch free online (YouTube & IMDb TV). 5 episodes (100%) are available to stream on a subscription service (History Vault). 5 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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).

What it's about: A riveting new non-fiction series that delves into the world of infamous serial killers through a unique perspective rarely ever heard, as the family members of the killers come out of the shadows to reach out to the families of the victims. Each episode follows a different family’s journey, facilitated by Melissa Moore – daughter of Keith Hunter Jesperson, infamously known as the “Happy Face Killer” – as they connect with the families of the killer’s victims to express their sorrow and empathy.

Where to Watch: 4 episodes (40%) are available to watch free online (YouTube). 10 episodes (100%) are available to stream on a TV everywhere service (Lifetime & Lifetime). 10 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).