BBC Scotland investigates a disturbing rise in the number of assaults on police officers - 13,000 last year alone. Reporter Sam Poling investigates cases where officers have been shot, stabbed, assaulted, beaten up and even run over while on duty - and finds many police officers feel let down by a judicial system which they think fails to fully punish their attackers. The film will for the first time investigate why Scotland is the most dangerous place in the UK to put on a police uniform.