When Brian begins to experience the side effects of NZT again, Senator Morra demands he betray Rebecca in exchange for another inoculation. Also, Brian secretly looks for an alternate cure for himself while he works with Rebecca outside FBI parameters to find the creators of NZT

When Naz is detained on suspicion of funding terrorism, Brian and Rebecca's efforts to clear her name lead them to Naz's daughter, Ava , who reveals a family secret Naz is keeping from the FBI.