Liz and the Task Force investigate an infamous assassin who has a long history of weaponizing diseases, but has now turned to even more insidious activities. Red and Dembe travel to Cuba in search of a lead. Aram considers a new relationship.

Adam Griffin, Audrey Heffernan Meyer, Billy Eugene Jones, Brett Cullen, Caitlin Morris, Celia Schaefer, David Wilson Barnes, Elizabeth Bogush, Gregory Konow, Gustavo Pace, Jefferson Mays, Jimmie Saito, John Thomas Cramer, Justin R. G. Holcomb, Kevin O'Rourke, Nathaniel J. Ryan, Nili Bassman, Rich Mollo, Ross DeGraw, Salma Shaw, Stephen Christopher Marshall, Sue Jean Kim, Ty Doran, Zachary Unger