Enthusiasts of true crime have confessed to experiencing ‘vivid nightmares’ after immersing themselves in a ‘disturbing’ documentary series that unravels the depths of ‘human malevolence’.

This spine-chilling four-part series, initially released in 2021, delves deeply into the lives of two infamous Canadian murderers who concealed their horrific deeds beneath an alluring facade.

Ken and Barbie Killers: The Lost Murder Tapes mesmerized viewers upon its debut, but many true crime aficionados are only now uncovering it on the streaming platform HBO Max.

The ‘young and attractive’ duo, Paul Bernardo and Karla Homolka, were responsible for the kidnapping, sexual assault, and murder of three young women, including Karla’s own sister—a case that ranks among the most ‘notorious and menacing’ in Canadian history.

Once apprehended, Karla alleged that she had been coerced by Paul into participating in the heinous acts, portraying herself as another of his victims.

Nonetheless, authorities soon discovered a collection of video recordings made during the crimes, revealing a narrative starkly different from Karla’s claims.

True crime fans have admitted they have been left with ‘intense nightmares’ after binge-watching Ken and Barbie Killers: The Lost Murder Tapes

The four-episode series, which first came out in 2021, takes a closer look at Paul Bernardo and Karla Homolka, who hid their harrowing murderous reality behind a glamorous exterior

The case, and Karla’s sentencing, swept the nation and beyond, becoming one of the most controversial rulings Canada has ever seen. 

It began in late 1987 and early 1988, when over a 13-month period, 11 different women across were attacked by Paul, who had become known as the Scarborough Rapist. 

Karla soon started to learn about her fiancé’s sadistic sexual deviations, and according to the documentary, two days before Christmas in 1990, agreed to help him drug her then-15-year-old sister, Tammy, so that he could have sex with her.

Tammy tragically passed away after being drugged by the pair, sparking a wave of further sexual offences and murders of young women Paul held captive. 

The documentary synopsis teases that the action follows how ‘the glamorous couple became Canada’s most notorious killers’, with legal experts, family and friends sharing their accounts of their horrifying crimes.

Since tuning in, fans have flooded social media dubbing it the perfect watch for fans of the genre, with one penning on IMDb: ‘A disturbing yet compelling documentary that exposes the depths of human evil… chilling and heartbreaking documentary.’

Another chimed in: ‘This was hard to watch, hearing about how messed up and psychotic these killers are. The documentary was well done, wasn’t confusing and very informative. 4 episodes was a good amount too, not too much.’

A third said: ‘I binge watched the first 3 episodes, went to bed and had intense nightmares, and then got up and watched the last episode.’

Karla agreed to help Paul drug her then-15-year-old sister, Tammy, so that he could have sex with her – and Tammy passed away shortly after the crime

While over on TikTok, another true crime fan agreed: ‘Trigger warning this true crime documentary is shocking… honestly, you’ll be shocked when you watch it.’

Someone else wrote: ‘I honestly couldn’t believe what I watched, honestly all these true crime documentaries I’ve seen so far are so eerie and disturbing.’

And fans over on Rotten Tomatoes agreed, with one sharing: ‘Outstanding doc series. It’s the definitive account of perhaps the most infamous murder case in Canadian history.’

Karla, originally from St. Catharines, Ontario, was just 17 years old and Paul, from the Scarborough area of Toronto, was 23, when the pair met. 

Paul, who was a University of Toronto student at the time, studying to be an accountant, saw her at her hotel restaurant and felt ‘love at first sight.’

‘There was electricity in the air, it was love at first sight,’ Alan Cairns, author of Deadly Innocence, a book about the murders, reveals in the documentary. 

‘They called it a match made in heaven, but it was clearly a match made in hell.’

The two quickly fell in love – but while their romance was blossoming, Paul, who had been reported as a teenager for watching female neighbours through their windows, was secretly attacking women across southern Ontario. 

The couple killed Leslie Mahaffy, 14, (left) just days before their wedding, and later abducted and killed Kristen French, 15, (right) as she walked home from school

‘He seemed so normal. This is common in psychopathic personalities, they are often very charming,’ Frank Davey, author of Karla’s Web explains in the documentary.

During his high school years, he had several girlfriends who all later accused him of becoming ‘abusive’, with Alan explaining he would become ‘fixated on violence’.

Paul later had his DNA collected in conjunction with the crimes of the Scarborough Rapist, but it would take two more years for them to get the results back, after the sample mysteriously disappeared.

During this time, Paul and Karla were engaged, and Karla was soon helping her husband-to-be commit his crimes against teenage girls. 

Not long after her own sister Tammy, then 15, was killed as part of their web of crimes, just days before their wedding, Paul woke Karla up in the middle of the night with a present – a young girl he had kidnapped.

Paul had taken 14-year-old Leslie Mahaffy from the backyard of her home in Burlington, Canada, and had planned to keep her as his sex slave.

He, with with Karla’s knowledge, held her captive for hours, repeatedly assaulting her and recording the attacks on video – but less than 24 hours later, she was strangled to death.

During this time, Paul and Karla were engaged, and Karla was soon helping her husband-to-be commit his crimes against teenage girls

On April 16, 1991, the newlyweds abducted 15-year-old Kristen French while she was walking home from school. 

According to eyewitnesses, Karla asked the teen to come over to their car because they needed help with directions, when suddenly, Paul grabbed her and forced her into the vehicle. 

The couple kept Kristen in their home for days while recording the assaults, before they eventually killed her. Her body was discovered in a ditch days later. 

According to people who knew them, the couple had an ‘intense obsession’ with each other, which played out as part of their crimes. 

‘It was a very destructive relationship. They fed into one another, and encouraged and supported one another in doing things that were unspeakable,’ Dr. Fred Berlin, a sexual disorder specialist at Johns Hopkins University, says in the documentary.

‘They were attractive, intelligent, in love. The idea that these were the bad guys and that they were capable of doing anything so vile is something that’s hard for us to comprehend.’

Alan added: ‘The interest in this case was not sparked by the brutality of the murders. It was the disbelief that such an attractive man and beautiful young girl could team up and be involved in something so bad.’

In January of 1993, Karla decided to leave Paul after he allegedly beat her with a flashlight, leaving her with two black eyes and a broken rib

In January of 1993, Karla decided to leave Paul after he allegedly beat her with a flashlight, leaving her with two black eyes and a broken rib. 

Around the same time, Paul’s DNA sample – which had been collected two years earlier while police were investigating the Scarborough Rapist – was finally processed.

The police soon started to link all the crimes together, and they brought Karla in for questioning, in the hopes that she’d turn on her ex-lover. 

She claimed that Paul had made her participate in the gruesome killings against her will and agreed to testify against him in exchange for a reduced sentence for herself.

Karla was convicted on two counts of manslaughter and received a 12-year sentence, and filed for divorce from Paul. 

However, it wasn’t until after she had been sentenced that police found video tapes the couple had taken while committing the crimes, which showed her not only helping Paul in his acts, but also participating in some of them herself.

Paul was arrested on February 17, 1993 and charged with nine different counts, including kidnapping, unlawful confinement, unlawful aggravated assault, and murder. 

His trial began two years later, and Karla was the prosecutor’s key witness. She took to the stand where she branded him as the mastermind behind the whole thing.

On September 1, 1995, Paul was found guilty of all nine charges, and was sentenced to life in prison while, after serving 12 years behind bars, Karla was released on July 5, 2005.

Paul remains in prison and was denied parole for the third time in 2024.

Ken and Barbie Killers: The Lost Murder Tapes is available to stream on HBO Max