: Provided by Entertainment Weekly , this gives a scene-by-scene breakdown of Liz's betrayal and the N-13 mystery.
In this episode, Raymond Reddington and the Task Force pursue Mary Bremmer, while Elizabeth Keen executes a complex plan to align with Bremmer's brother, . "The Blacklist" Chemical Mary (No. 143)(2021)
: Mary is developing a nerve agent called HeePhoxy , which is invisible, odorless, and can kill through simple skin contact or inhalation. : Provided by Entertainment Weekly , this gives