Regarding Scientology and Tom Cruise, there's some interesting tea out there from an actress called Nazanin Boniadi, who I've seen in Homeland and Counterpart. A very intelligent lady who could have had a stellar career in medical research had she not become an actress. Anyway, here's what her Wiki page says about her experience as Tom's girlfriend.
"In the mid 2000s, she was a dedicated Scientologist. Her mother had also been a Scientologist.[42]
In late 2004 to early 2005, she had a brief relationship with actor Tom Cruise. According to claims of the documentary Going Clear, her acquaintance with Cruise was not accidental and the Church of Scientology prepared and planted her for this role.[43] The Church also vetted her along with dozens of other women as a potential wife for Cruise, but she was not selected.[44][45]
On 10 May 2017, American journalist Tony Ortega reported on FBI testimony that Boniadi had given in January 2010 regarding her relationship with Cruise through the Church of Scientology.[46] Boniadi's testimony describes how the Church's Office of Special Affairs selected her to be Cruise's girlfriend.[44]
In October 2004, Boniadi was volunteering for the Office of Special Affairs in Los Angeles when she was told by Church official Greg Wilhere that she had been selected for a special project. Boniadi was told that her dental braces had to be removed and that her red hair highlights had to be corrected; she was also encouraged to end her relationship with her longtime boyfriend. She had to sign a confidentiality agreement, stating she could not abandon this special project without the Church's approval.[46]
About a month later, after being flown to New York by the church, Boniadi learned that her project was to become a suitable girlfriend for Cruise.[47] She stated in her testimony "at the beginning of the relationship [he] was very romantic but as the relationship progressed he began to have temper tantrums. He began to show violent tendencies". After their relationship ended in January 2005, Boniadi confessed her devastation to a friend and fellow church member. She was punished for this according to Church policies: she "had to dig ditches at midnight and scrub floor tiles... She was placed on a curfew... escorted everywhere she went". She also testified that she felt as if "she was a victim of white slavery, because she traveled across state lines under false pretenses".[46]
Boniadi left the Church of Scientology soon afterwards[48] and as of October 2014 called herself a "non-practising Muslim".[49]
In 2017, she tweeted congratulations to Leah Remini and Mike Rinder on their series Scientology and the Aftermath winning an Emmy Award.[50]
In a later interview with the Los Angeles Times, Boniadi described her role in Counterpart as cathartic and therapeutic, saying "sometimes there are personal traumas that you don't ever talk about publicly but you pour it into your work". She continued: "this idea of shedding indoctrination and finding out who you are for me is a strong one. It has been extremely therapeutic for me to be able to put it out into the world through my art as opposed to openly discussing it."