hayu, NBCUniversal’s ad-free OTT platform is set to premiere ‘Unholy Matrimony: Black Widow Murders’ on September 26.

The series reveals stories of women who no one would suspect to be so devious often leaving death in their wake – all in the pursuit of wealth, lust, or power.

The new series premieres with the episode “Melissa Friedrich.”

In the episode, a sweet Canadian woman finds love on the internet and leaves an international trail of lovers falling victim to mysterious illnesses in her wake.

Throughout the season, episodes unveil unique stories of women who turn society’s assumptions about the “fairer sex” upside down, spinning webs of deceit to capture their unsuspecting victims. Whether it’s a career con artist, serial divorcee, or homemaker leading a secret double life, the women sometimes take control in the most violent way imaginable. They won’t stop until investigators finally bring them to justice.

Unholy Matrimony: Black Widow Murders is produced by Catalina Content and Lark Productions.

Jeff Collins and Deborah Allen serve as Executive Producers and Madeline Griffey as Co-Executive Producer for Catalina Content, and Erin Haskett as Executive Producer for Lark Productions.