A California doctor who appeared in a reality TV dating show and a woman co-defendant have been charged with drugging and sexually assaulting two women, and authorities suspect there may be many more victims.

Orange County District Attorney Tony Rackauckas announced charges Tuesday against 38-year-old orthopedic surgeon Grant W. Robicheaux of Newport Beach and 31-year-old Cerissa Laura Riley of Brea.

The district attorney showed reporters video of Robicheaux from a 2014 Bravo TV show called “Online Dating Rituals of the American Male” in an episode titled “Three’s A Crowd.”

Rackauckas says the two women who were assaulted met the pair socially.

In April 2016, Robicheaux and Riley met a 32-year-old woman at a restaurant in Newport Beach, the DA says. 

The pair invited the victim to a party in Newport Beach and then took her to Robicheaux’s apartment once she was intoxicated. 

The DA says the defendants gave the victim multiple then raped her while she was intoxicated. 

The victim contacted the Newport Beach Police Department the next day and underwent a forensic exam, which tested positive for multiple controlled substances.

On Oct. 2, 2016, Robicheaux and Riley met the second victim at a bar in Newport Beach. 

The DA says they drank alcohol with the victim until she was no longer conscious.  

The defendants are accused of bringing the victim to Robicheaux’s apartment and sexually assaulting her with intent to commit rape.

The victim woke up and screamed for help until a neighbor called the police, who responded to the scene and investigated. 

The DA says large quantities of illegal drugs were recovered in Robicheaux’s residence on January 9. 

Robicheaux is also accused of possessing two illegal, unregistered assault rifles, four other firearms, and several large capacity magazines.

Police arrested the defendants at Robicheaux’s residence on Sept. 12. 

Charges include rape by use of drugs, oral copulation by anesthesia or controlled substance, among others.

The DA says Robicheaux and Riley have traveled together to various festivals and locations since 2015 including Burning Man, Dirtybird Campout, Splash House, and landmarks near Page, Arizona.

Authorities are asking for any additional victims to contact Eric Wiseman at 714-347-8794.

Neither defendant could be immediately reached for comment by telephone.

The Associated Press contributed to this report