ITV's Believe Me follows the harrowing true story of the victims of black cab rapist John Worboys
In total there are four episodes in the series.
You can watch the first episode of Believe Me on Sunday, May 10, on ITV1 and ITV (https://www.walesonline.co.uk/all-about/itv) X from 9pm.
The second episode will then air the following day on Monday, May 11.
The third episode and fourth episodes will then air the following week on Sunday, May 17, and Monday, May 18.
ITV is set to air a harrowing major new drama following the true story of how the victims of one of the most prolific sex attackers in British history were failed by the system.
Believe Me tells the story of black cab rapist John Worboys who preyed on women who trusted him as a licensed taxi driver.
When they would get in the back of his cab in the 2000s he would drug and sexually assault them.
He was convicted in 2009 for crimes including sexual assault and drugging with intent against 12 women between 2006 and 2008, with their cases selected from a large number of suspected further victims.
The series follows the stories of victims Sarah (Aimée-Ffion Edwards) and Laila (Aasiya Shah) who reported the sexual assaults and were failed by the Metropolitan Police who didn't thoroughly investigate the allegations.
We later see the women fight to keep their attacker in jail years after he was convicted for his crimes.