Brian and Boyle spot something from above.
Following a stunning betrayal to their team, Brian and the FBI race to stop an NZT-enabled Sands (Colin Salmon) and his associates from orchestrating an international incident. Also, Brian experiences devastating side effects when his NZT immunity starts to wear off, on the Season 1 finale of Limitless.
"Finale: Part Two!!" (Season 1, Episode 22 of Limitless)