A 45-year-old doctor is facing jail today after admitting he used his position as a GP at a medical practice in Royal Wootton Bassett, near Swindon, Wiltshire, to assault more than two dozen women.
Dr Davinderjit Bains, 45, filmed the attacks on his Tieex 4GB Waterproof HD Spy Watch DVR, which has been likened to something out of a 007 film.
It has a built-in camera on the face - with simple on and off buttons to record - and can be bought on the internet for less than £60.
Detectives branded Bains a "sexual predator" and said he had "massively" breached the trust that patients place on their doctor.
Swindon Crown Court heard today that Bains has admitted more than 30 charges including sexual assault and voyeurism.
At a previous hearing, Bains admitted 12 charges of assault by penetration, 11 charges of sexual assault and 11 charges of voyeurism.
Today he admitted a further two charges of voyeurism, two of sexual activity with a child and a single charge of assault by penetration.
In total Bains has pleaded guilty to 39 sex charges.
His not-guilty pleas to three charges of sexual assault and a single count of administering a noxious drug with intent to commit a sexual offence were accepted by the Crown and will lie on file.
At the earlier hearing, Judge Douglas Field banned the media from reporting the guilty pleas until today when the court heard that Bains will not face trial.
Bains, of Nyland Road, Swindon, was remanded into custody to await sentencing.
The offences were committed against 30 women - aged between 14 and 51 - between July 2010 and May 2012.
The police investigation began in June last year when a 19-year-old woman told officers she thought Bains had filmed her as she showered and alleged that she had been sexually assaulted by him in Swindon.
When detectives arrested Bains at the Tinkers Lane Surgery in Royal Wootton Bassett, they discovered his hi-tech wristwatch with spy camera.
They later recovered 361 high-quality video clips from Bain's watch and home computer.
Detective Inspector Mark Garrett, who led the investigation, said Bains had used his position as a GP to abuse patients.
"They put their trust in their doctor and Dr Bains breached that trust massively - compromising his professional position - and breached that trust to the highest order," he said.
"He is a sexual predator, simple as that. And he was allowed to abuse his position of trust and offend for two years."
Mr Garrett said Bains had shown no remorse at all.
"This is an exceptional case without doubt. I have never come across this before. So I would say without doubt this is one of a kind," he said.
"I don't ever like to guess what the sentence will be but I am expecting a substantial prison sentence without a doubt.
"He has shown no remorse at all. He failed to give an account when he was interviewed by my officers.
"I would like to recognise the bravery of the victims who were willing to give evidence in court if this case had gone to trial."
Bains qualified as a doctor from Mangalore University in 1993 and became a GP in 2007. He is currently suspended from practising by the GMC.
When he was first arrested a helpline was set up by NHS Wiltshire for patients at the surgery.
Bains also asked for a further 10 offences of sexual assault by penetration, eight of sexual assault and 47 of voyeurism to be taken into account when the judge passes sentence.
The judge ordered pre-sentence and psychiatric reports to be compiled.
He told Bains, who wore a black open-necked shirt and dark grey suit: "You will be remanded into custody and you will be brought back here on a date to be notified to you."
n a statement the Tinkers Lane Surgery said it was "appalled" at the crimes Dr Bains had committed.
"This has been a shocking and distressing case for all concerned," the statement said.
"The partners, GPs and staff of Tinkers Lane Surgery are deeply saddened by the actions of this former colleague and our sympathies remain entirely with the victims and our patients and their families.
"We are appalled that the sort of crimes to which Dr Bains has today pleaded guilty could happen in general practice and we have worked hard with colleagues at NHS Wiltshire and Wiltshire Police to ensure the processes we have in place at the surgery are as robust and safe as possible for our patients.
"We will now seek to rebuild the trust and the confidence of our community and our patients."
NHS Wiltshire, the local primary care trust, said in a statement: "We are appalled at the crimes to which Dr Bains has today pleaded guilty.
"It is clear that he violated the trust and dignity of those who looked to him for professional care and support.
"Such cynical abuse of his position, and way he concealed these serious offences, is reprehensible.
"We want to reassure all patients and the local community that NHS Wiltshire has worked closely with the practice and Wiltshire Police since becoming aware of these serious and shocking incidents.
"We have also conducted our own investigation to see what, if any, lessons can be learned from this and we are determined to ensure that any safeguards are shared with the wider NHS to further protect all patients in future.
All appropriate and relevant steps have been taken to ensure the processes followed at the practice are now robust and safe as possible for their patients."
Mr Garrett, head of Swindon CID, said as many as 100 women fell victim to Bains.
"Dr Davinderjit Bains has now pleaded guilty to a total of 39 sexual offences.
"In addition, a further 65 sexual offences have been admitted and will be taken into consideration.
"A large number of female patients, including teenage girls, put their trust in this man to treat them with the professionalism, care and discretion that we all expect of our family doctor.
"But today he stands exposed as someone who has utterly betrayed that trust for his own sexual gratification.
"This has been a detailed and sensitive investigation by Wiltshire Police.
"Two of my female detectives viewed hundreds of video clips.
"They then had the task of identifying the victims and letting them know the horrible truth that the intimate examinations they had undergone had been secretly filmed by their doctor, using a camera hidden in his watch and that many of those examinations were medically unnecessary.
"Now, as Dr Bains awaits what I hope will be a substantial prison sentence, I would like to pay tribute to the teenage student lodger who came to us with her concerns about his behaviour when she stayed at his home.
"Without her coming forward we would have known nothing of Dr Bains' shameful activities in the privacy of his consulting room at the Tinkers Lane Surgery.
"I would also like to acknowledge the bravery of that young woman and the patients who were also his victims.
"They provided accounts of what took place and told us they were prepared to give evidence, had this case gone to trial - happily they were spared that additional ordeal.
"I would like to acknowledge the support which NHS Wiltshire and Wiltshire Council gave to this Wiltshire Police investigation.
"In almost 30 years of police service I have never come across a case like that of Dr Davinderjit Bains. I am proud and pleased that we have brought an end to his years as a predatory sex offender."