A gunman hides in a body bag sent to Ducky, then takes the medical examiner, Gerald and Kate hostage. Gibbs must find a way to free them.
The BAU travel to Philadelphia where the latest victim of the The Replicator has been found murdered.
Jane is forced to tackle a case when her former classmate is found dead at the high school reunion; Korsak's former wife visits.
House 51 come under investigation for negligence after Interim Chief Pridgen makes a grave tactical error during an apartment fire.
In order for Fitz to make the biggest impact with his State of the Union address on gun control, Cyrus sets out to recruit a power couple who are influential on the issue.
