Complete story — includes the ending
Clown Dale Schmitt is killed. Near the murder site, there is a manhole cover, below is the pipeline delivering New York City's drinking water. The news sparks panic buying of bottled water. However, the virus introduced into the water only causes diarrhea. Virologist Raymond Thorpe created it before fleeing the country. Gio Bianchi is a suspect, as his construction company had repeatedly won the contract to build a water filtration plant for the city, a contract that would only be implemented if NYC's disinfection methods are no longer enough. But the one to gain immediately from the superbug is Wendell Hecht, Vice President of Water Integrity at the Department of Environmental Protection (DEP), who holds the patent for the only home water filter recommended by the DEP. Since it would take years to build the filtration plant, Hecht would have become rich. Hecht hired Thorpe to contaminate the water supply. Schmitt saw him doing it, so Thorpe killed him. Meanwhile, Bell gets provoked into a fight by the ex-husband of his girlfriend (an assistant district attorney). It is actually a scheme to get her removed from a particular case.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Elementary episodes. HTML formatting and reference markers removed. · Content license