A DOCTOR linked to the bizarre NXIVM sex cult has been charged with carrying out illegal human experiments, it has been reported.

Brandon Porter is accused of treating followers of the cult - allegedly co-run by Smallville actress Allison Mack - during "fright" sessions where they were shown videos of gang rape and dismemberment.

5 Porter is said to have forced members to watch shocking videos

5 The cult's founder, Keith Raniere, was arrested in New York

5 The exterior of the NXIVM Executive Success Programmes HQ in Albany New York Credit: Getty - Contributor

The 44-year-old is said to have forced members to watch a video of the murders and machete dismemberment of four women and other sickening clips.

Dr Porter is also accused of running an improper study monitoring the brain waves of people who attended his programmes, reports the New York Post.

The charges come eight months after the city's Health Department refused to act on a complaint about Porter from a former cult member.

Jennifer Kobelt said in her August 2017 complaint that Porter may have performed his “fright study” on as many as 100 people.

5 Cult members were reportedly branded with their leader's initials

5 Cult member Allison Mack was arrested last month and accused of sex trafficking Credit: Rex Features

“He continued to film my reaction for at least 10 minutes as I just sat there, dry heaving like I was going to puke and crying very hard,” claimed Kobelt, a Canadian actress.

“He failed me, not only as a friend but as the medical practitioner I had trusted on numerous occasions with my health while I was in New York,” Kobelt said in the complaint.

In a later letter, the state Office of Professional Medical Conduct (OMPC) told Kobelt it would not investigate Porter, adding that “the issues you have described are not medical misconduct".

However the OMPC has now charged Dr Porter with a number of offences including moral unfitness, gross negligence and gross incompetence

Smallville actress Alison Mack stars in NXIVM recruitment video

He allegedly showed cult members video of the four women being murdered and film clips showing an African-American man being stomped by a Nazi, a conscious male being forced to eat his own brain matter, and a graphic gang rape.

A hearing on the charges is scheduled for June 27. He faces having his medical license revoked or suspended.

The cult's leader, self-help guru Keith Raniere, 57, has been in jail since he was arrested in Mexico in March on charges including sex trafficking.

Keith Raniere, also known as​ ​'The Vanguard'​ ​to Nxivm​ ​members talks about​ humanising ​entertainment

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Mack, 35, was arrested in April and is living with her parents in California under house arrest. She is accused of recruiting women into a sex trafficking operation.

Women were lured into the cult where they were ordered to have sex with Raniere, branded with his initials and put on extreme diets, prosecutors allege.

Investigators have said they anticipate there will be additional arrests and charges.