TLC Zeros In On Mary Cosby And Her Utah Church In Explosive Docuseries

The brand new series, titled “The Cult Of The Real Housewife,” guarantees to drag back the curtain and address the numerous horrifying allegations which have been made against Mary Cosby and her husband, Robert Cosby Sr.

In accordance with TLC, the network will air an explosive three-part docuseries all about “RHOSLC” star Mary and her husband, Robert, who also happens to be her step-grandfather.

Their church, Faith Temple Pentecostal, has been a subject of speculation for years and was an integral storyline during season 2 of “RHOSLC.”

“The Cult Of The Real Housewife” guarantees to “unpack the allegations behind the headlines and reveal the darker and more unsettling truth” about Mary and Robert.

Over three “gripping” parts, TLC will document the “dramatic rise” of Faith Temple — from the muse laid by Mary’s grandmother, Rosemary ‘Mama’ Cosby, to the “controversial transfer of leadership” and Rosemary’s husband’s marriage to Mary.

The fiery docuseries is not going to only explore the behind-the-scenes details of the church, but it is going to also feature the voices of former churchgoers and “provide deeply personal and disturbing accounts from [Mary’s] relations.”

“The docuseries also features investigative journalists and bloggers who’ve been tracking this story from the start, in addition to a number one cult expert who can offer insight around a playbook designed to implement loyalty in mind-control cults,” the press release read.

Along with the extremely candid interviews and statements from ex-congregants and relations, “The Cult Of The Real Housewife” will feature audio recordings of “controversial sermons delivered by Mary and Robert Cosby Sr.”

Mary’s church has been shown in-depth on earlier seasons of “RHOSLC,” and through season 2, an alleged former congregant claimed the truth star and her husband were running a cult. “Is it a cult? Yes. Does she call herself a God? Yes,” they said during an intense scene with forged member Lisa Barlow.

Nonetheless, Mary clapped back at those claims during an interview with Entertainment Tonight, insisting people have been calling Faith Temple a cult since her grandmother began it.

“They are saying that about just about every church,” she said. “It’s no cult. I used to be taught church needs to be a spot where love at all times flows.”

She added, “The individuals who know me – my church members — they know those are false allegations.”

Fans have already begun weighing in on the brand new TLC docuseries about Mary and her husband, with one Redditor claiming their jaw dropped over the news.

“I feel like her whole storyline in season 1 and a couple of was in regards to the way she ran her church and cult allegations and ever since she got here back to the show it hasn’t been mentioned AT ALL!” the Redditor said.

One other user commented, implying the allegations against Mary weren’t surprising due to the placement, adding, “Utah is unfortunately infested with church cults and MLMs that use religion and God to prey on innocent lost people.”

“I do not expect much of latest information … but this will probably be a fun watch,” a 3rd wrote. “Truthfully, just explaining Mary and her situation to individuals who don’t watch the show … could actually blow up even beyond the Bravo watchers.”

Being based in Utah, a portion of “RHOSLC” is about religion, specifically Mormonism.

Heather Gay has been one of the vocal members of the forged about her experience, sharing deeply moving stories about her difficult marriage and her decision to depart the church altogether.

She penned a memoir, “Bad Mormon,” sharing more of her experience in greater detail, and in November 2025, she hosted a three-part docuseries of her own on Bravo titled “Surviving Mormonism.”

In accordance with a previous report from The Blast, Gay’s project explored the Church of Latter-day Saints’ “seemingly perfect” image, which has long been concealed behind the church’s vivid, white doors.

Within the docuseries, Gay has intense conversations with abuse survivors, ex-Mormons, and former LDS church leaders while reflecting on her own departure from religion.