Oxygen, known for its premium true-crime content, delves into the chilling world of serial killers, highlighting those lesser-known but equally terrifying as infamous criminals like Dahmer or Bundy. For every notorious name, countless others remain hidden from the public eye. 

The new series Unknown Serial Killers of America premieres Sunday, May 18 at 7 p.m. ET/PT on Oxygen following a new episode of Snapped.

The one-hour episodes of Unknown Serial Killers of America dive into these horrifying criminal tales, exploring the transformation of these individuals into menacing figures. With insights from law enforcement who handled the cases and heartfelt stories from victims’ families, the series brings attention to killers who avoided fame and investigates their ability to commit such heinous acts undetected for extended periods. 

Throughout the six-episode season, cases include a complex murder involving various unidentified barrel-contained bodies linked decades later to a serial predator of women and children; the killings of multiple gay men; and the discoveries of an amateur sleuth leading to a potential murderer of 12 black women, who remains elusive until a disturbing video provides crucial evidence.

Upcoming episodes include:

“Carl Watts” (May 18 at 7 p.m. ET/PT)

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.

“William Suff” (May 25 at 7 p.m. ET/PT)

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.

“Daniel Conahan” (June 1 at 7 p.m. ET/PT)

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.

Unknown Serial Killers of America is produced by Pantheon Media Group. Steven Michaels, Jodi Flynn, Andi Walker Ochoa, Ariel Brozell, Steffanie Siebrand, Elvia Van Es Oliva and Haylee Vance (showrunner) executive produce.

About Oxygen True Crime

Oxygen True Crime is a multiplatform crime destination for women. Oxygen True Crime remains one of the fastest-growing cable entertainment networks with popular original programming, including the flagship Snapped franchise, Cold Justice, Killer Relationship with Faith Jenkins and breakout event specials such as The Pike County Murders: A Family Massacre, Selena & Yolanda: The Secrets Between Them, and Murdered and Missing in Montana. The network had its best year ever in 2023 in total viewer cable rankings in all day and primetime thanks to one of cable’s most-engaged audiences. Oxygen True Crime’s over-the-air platform recently launched in select U.S. markets. Oxygen True Crime is part of NBCUniversal’s Entertainment portfolio, which includes NBC, Bravo, E!, Oxygen True Crime, SYFY, Universal Kids, USA Network and Peacock. For more information, visit oxygen.com.   

About Pantheon Media Group

Pantheon Media Group, formerly Asylum Entertainment Group, is a premier Emmy® Award-winning production powerhouse dedicated to delivering groundbreaking content across live events, factual entertainment, premium documentaries, true crime, sports and more. Part of WME’s unscripted content business in Los Angeles, Pantheon oversees nearly 20 leading production labels, including Done+Dusted, Film 45, Texas Crew Productions, Breaklight Pictures, Big City TV and is behind acclaimed projects such as Omnivore (Netflix), Shaq (HBO), How I Caught My Killer (Hulu) and the 47th Kennedy Center Honors (CBS).

Led by Chairman Steve Michaels and CEO Jen O’Connell, Pantheon Media Group continues to expand its global reach through strategic partnerships, creative ventures and investments in innovative studios such as Ladywell Films, Soho Studios and DARE Pictures. With offices in Los Angeles, London, Dubai and Vancouver, Pantheon remains committed to crafting compelling storytelling that resonates worldwide.