In June 2009, Panorama examined the case of David Southall, the consultant paediatrician best known for accusing a man of killing his children after seeing him interviewed in a television documentary.
With exclusive access to Professor Southall at a time when child protection was very much back in the spotlight in the aftermath of the death of Baby Peter Connelly (known only as Baby P at the time) the programme met the doctor when his career as a top consultant was hanging in the balance.
The General Medical Council has now announced that it will not rehear the one outstanding case against him, bringing to an end 16 years of cases against him.
Last year, he was also cleared of serious professional misconduct allegations relating to his record keeping in two cases.
Professor Southall has indicated that he plans to sue the GMC in relation to the cases brought against him.
Online bullying is rapidly growing in frequency and intensity. A new breed of self-styled "trolls" are stalking social networking websites, aiming their vicious attacks at victims who range from television celebrities to grieving families via tribute sites.
Declan Lawn meets X Factor star Cher Lloyd, who describes how cyber attacks are ruining her life, and highlights a new survey revealing that one in 13 young people say they face persistent online bullying.
Panorama tracks down some of the bullies and asks what more could be done to stop them?
If you, or anyone you know, is affected by the issues raised in this programme, help is available.
The BBC's Share Take Care website offer a host of resources, tips, guides and advice for both parents and young people dealing with issues of cyberbullying and general internet safety.
We welcome your comments on this programme. Please use this forum to tell us what you think.
Packed in like sardines, on trains that often arrive late - that is life on some of Britain's busiest train routes.
Adding to the pain are record-level ticket prices that just went up.
So why are train fares so expensive? Panorama's Vivian White investigates the cost of riding on the railway.
Please use this forum to tell us your views on tonight's programme. We welcome your thoughts.