TLC's docuseries The Cult of the Real Housewife explored allegations against Real Housewives of Salt Lake City star Mary Cosby and husband Robert Cosby Sr. - including monetary extortion and affair claims. The special, which premieres on January 1, highlighted ex-congregants of Mary, 53, and Robert's church, Faith Temple Pentecostal Church. Mary's sister, Denise Jefferson, and cousin Dan Cosby were also interviewed alongside investigative journalists and bloggers who covered Mary's backstory since she joined The Real Housewives of Salt Lake City in 2020.