Lu investigates the mysterious death of Pollack with Jordan as the prime suspect. To find and save Jordan, Woody, Bug, Nigel and Macy must investigate their way to the truth, combating the law, politicians and each other.
A special prosecutor appears to audit the department, Jordan skirts the law trying to catch a pedophile, and Woody is horrified when pieces of a woman are found scattered along the highway, and no one seems to care.
The death of a young boy at police hands sends the city into chaos after a rushed hearing, and puts someone at risk as various team members go out to gather more evidence or make their way back to the morgue on foot.
In a triple shooting a defense attorney was shot and presumed dead, however he is actually still alive. Macy has to do his autopsy, but keeps putting it off because of their prior relationship. The morgue struggles under Ivers' new restrictions.
After defying William Ivers and performing an autopsy on an immigrant, a deadly viral outbreak is revealed as the Medical Examiner's team races to find the source of the virus before all of Boston is infected.
Dr. Switzer is asked to determine the cause of death for a mummy, but the results are surprising; Jordan and Garret work the case of a young girl buried in another's grave; and Jordan begins to have even more neurological difficulties.
Woody and Jordan team up to locate a hijacked school bus that is full of children. Elsewhere, the lifeless body of Santa shows up at the morgue; and Jordan's secret is finally revealed as her peers become concerned for her health.
Jordan returns to work early and energized, convinced she's a changed person. Kate and Woody work a case where a groom was gunned down at his wedding, and Bug, Jordan and Elliot try to find who killed a good Samaritan. Meanwhile, Bug is still reeling from what happened to him.