The Professionals S01 E01 Private Madness, Public Danger

"ANARCHY, ACTS OF TERROR, CRIMES AGAINST THE PUBLIC. TO COMBAT IT WE'VE GOT SPECIAL MEN..."

Charles Nesbitt, an expert on chemical weapons, threatens to contaminate the water sources of London with a lethal hallucogenic drug and in order to back up his claims, plans several small 'demonstrations' in warning to the local authorities - including CI5.