S4·E16 Pier 17

The dock workers who load nitroglycerin onto freighters at Pier 17 are on edge. A recent explosion at the harbor killed four men and the FBI believes it was sabotage by an insider. Dave Delaney and his foreman, with their eyes peeled for trouble, have decided the new guy is really a G-man working on the case. The true saboteur initially goes unnoticed.