Jason Altman

As Danny consults a psychic to solve the murder of a young boy, Frank is at odds with the mayor over how best to protect the city from an uptick in crime following a high-profile shooting.

In the Season Four finale, Finch and Root race to save The Machine, which has been located by its AI rival, Samaritan. Also, Reese is caught in the middle of the final showdown between rival crime bosses Elias and Dominic.

After learning that a member of the inner circle of the terrorist organization "Boko Haram" has fallen ill with a deadly virus, Elizabeth formulates a plan to leverage his weakness and release a group of schoolgirls they are holding captive. Also, Henry gets new information on the terrorist Jibral Disah that leads his team closer to pinpointing his location.

Ellen and Brian agree that they need to take down Duncan to have any chance of escaping, so she sneaks away to see a man who has previously helped her solve problems. However, unbeknownst to her, this man has ties to Duncan. Meanwhile, Archer's accomplice plans to reveal to the Assistant District Attorney information about a murder Archer committed. Recurring guest star Joanne Kelly (Warehouse 13) appears as Vanessa, sister of the First Lady, Mary (recurring guest star Mary Elizabeth Mastrantonio).