This week Four Corners reveals Australia's system of health regulation is allowing doctors who have groped, dated and even raped their patients to continue practising.A six-month investigation into the medical complaints handling process has found hundreds of medical practitioners have been sanctioned by tribunals for sexual misconduct involving patients since 2010.Many are still registered to work.Reporter Emily Baker has forensically analysed over a decade's worth of healthcare complaints and uncovered a complex and unwieldy system struggling to protect the public from sexual predators.The program follows several disturbing cases -- patients tell Baker harrowing stories of betrayal at the hands of those entrusted with their care – and the system that struggled to respond.Baker investigates where the system is failing and asks how it could be improved.