Walter Peck, EPA agent is charged with investigating the unusual activities of the Ghostbusters in their NYC based headquarters, only to become the guy that literally everyone - inside the movie and outside - hates, constantly standing in the way of Venkman and co. Things escalate to the point where Peck forces the Ghostbusters to switch off their containment unit, releasing all the ghosts they had caught over the previous weeks. But let's give Peck his credit, it's his job to investigate suspicious and unsafe activity, and the containment unit just happens to be highly nuclear. So this man accidentally causes widespread ghoulish activity and receives the hatred of the entire population of New York City simply by doing his job. Furthermore, because Peck has the Ghostbusters arrested, he inadvertently frees Louis/Vinz, allowing the possessed man to meet with Dana/Zuul, who combine to bring forth Gozer to wreak havoc upon the world. All that, simply from doing what he's paid to do, in the name of investigating a nuclear device in the heart of a major city.
