Unknown Serial Killers of America (2025)

Season 1

Explores the chilling cases of lesser-known serial killers whose crimes went unnoticed for years, leaving a trail of fear and unsolved murders before they were finally caught.

Released May 18, 2025 Episode 43 min None+

Genres: Crime, Documentary

Watch Providers: Peacock Premium, Peacock Premium Plus, Spectrum On Demand, OXYGEN, YouTube TV

Production Companies: Pantheon Media Group

Network: Oxygen

Country: United States
Languages: English

IMDb

7.4

/79/

Trakt

/11/

TMDb

Tomatoes

S1E1 - Carl Watts

Chilling confessions from a vicious slasher detail only some of his 100+ victims. When he's set to be the first serial killer ever released from prison, an eyewitness from decades prior could force justice on the man who vows to kill again.

May 18, 2025, midnight

S1E2 - William Suff

In the '90s, a deranged killer stalks sex workers in Riverside, Calif., claiming the lives of 13 women. When a would-be victim describes the perp to police, the race is on to catch the murderous john before he strikes again.

May 25, 2025, midnight

S1E3 - Daniel Conahan

Five corpses are found on the Florida hog trails. The investigation stalls until two men narrowly escape the perp's clutches. Years later, eight more bodies are found in nearby woods, leaving police to wonder if it's the same evil killer.

June 1, 2025, midnight

S1E4 - Terry Rasmussen

Multiple unidentified bodies are found inside barrels in a New Hampshire forest. Decades later, a murder 3,000 miles away reveals their connection to a serial predator who changes his identity after every violent kill.

June 8, 2025, midnight

S1E5 - Maury Travis

From 2001 the bodies of 12 black women start to surface in Missouri and Illinois. As the investigation intensifies the killer start to taunts authorities.

June 15, 2025, midnight

S1E6 - Herb Baumeister

A group of young gay men disappear in Indiana during the 1990s. An amateur detective uncovers clues that leads to identify a merciless offender.

June 22, 2025, midnight

Network: Oxygen

Episode Runtime: 43 min.

Season Runtime: 258 min.

Released: May 18, 2025

Last Air Date: June 22, 2025, midnight

Status: Returning Series

Certification: NR

REFRESH DATA

Updated: 4 days, 3 hours ago

Next update: 22 hours from now