Open Secrets - when everybody knows something is going on but it is never officially acknowledged. Things are left unsaid, remaining in this strange unacknowledged state for decades.

So why do some open secrets not come out sooner?

Nastaran Tavakoli-Far looks at the Catholic church, the trading floor and to the wrestling ring to find out why very different open secrets have continued for so long and why they eventually came out.

Presenter: Nastaran Tavakoli-Far Producer: Clare Spencer

Photo: Cassius, wrestler in ring Credit: Alistair Veryard Photogaphy