Murders, machete attacks, shootings and a firebombing have hit a quiet Scottish town - and all because of a sleeping pill. Panorama reports on the crime, violence and fear caused by addiction to Temazepam. It is commonly prescribed by GPs - but used regularly it can be addictive, and taken with alcohol it can lead to violence. Street demand for it is so strong that criminal gangs are fighting pitched battles for control of the lucrative black market in the drug.