NCIS: Naval Criminal Investigative Service Episode 4.13 Sharif Returns

After 10 kilos of highly toxic chemical weapons go missing, Gibbs and his team scramble to find it. The chemicals had appeared to have been skimmed off the top of a delivery to a research company by the delivering officer, and had been sold to Mamoun Sharif, a violent and unpredictable terrorist. However, the team quickly discovers that one of the research company's employees had attempted to anonymously sell a modified and harmless version of the chemicals in an attempt to scare the public and to make the company's stock price go up. But Sharif had discovered a way to make the chemicals active again, and had hatched a plan to unleash them on all of the major cities in the north east. With time running out, the team must find the chemicals and stop the terrorist.