91福利社

With compelling first-hand accounts, Panorama reveals the endless game of cat and mouse between prisoners determined to get their fix and officers equally determined to keep drugs out of their jails.

For the first time, visitors are caught on camera passing drugs to their nearest and dearest with hands as fast as any magician.

With exclusive access to a Category A jail, reporter Raphael Rowe hears from inmates and officers as well as from smugglers, mules and even a corrupt prison officer, fresh out of jail himself after being caught taking in drugs in return for money.