In “Runaways,” with Nora gone, Eph reluctantly joins Setrakian’s quest in hopes of gathering enough evidence to warrant a citywide quarantine. Fet encounters the unexpected inside the subway tunnels, ...

In “Gone Smooth,” Eph and Nora fight to save Captain Redfern’s life before coming face-to-face with the horrifying effects of the virus. A spike in rat attacks signals Fet that something inexplicable ...