When a developer at the tech think tank Brian frequents is murdered, he and Rebecca interview the robotic version of the victim that she created before her death for clues to the killer's identity. Also, Brian screens agents for a position to join Mike and Ike as his third bodyguard.

Limitless, based on Relativity's 2011 Bradley Cooper thriller, picks up where the movie left off and follows Brian Sinclair as he discovers the power of the mysterious drug NZT, and is coerced into using his newfound drug-enhanced abilities to solve weekly cases for the FBI.