The hunt for a Soviet spy turns deadly.
News spreads of Occam's death and the army has a witness, a young Indian boy. Darrow is on a manhunt for the spy, sending Meeks into a panic. Nora helps Meeks escape Darrow's grasp but when Theodore alerts Darrow that the spy is likely a scientist, Meeks is called into question. Nora devises a plan but Meeks has a plan of his own. Meeks scares the Indian boy's mother and when Meeks meets with Darrow, the Indian boy suddenly doesn't recognize Meeks. The Indian boy assists the army in drawing a picture of the spy who ends up looking like Meeks and Nora's handler. Later, Jeannie realizes Meeks is the spy and confronts him. Nora comes to the rescue. Meanwhile, Frank continues to try and get in Liza's good graces. Charlie lets Liza research the potential fallout of the Trinity test site. Abby and Darrow's relationship continues to grow through religion. Abby believes god is punishing her for what she did to Jean Tatlock.