Limitless

Brian Finch's life takes an extraordinary turn when he uses a mysterious drug, NZT, that allows him to access his full brain capacity. However, when an NZT-related murder lands Brian on the FBI's radar, he uses the drug in an attempt to stay ahead of the authorities long enough to clear his name.

Brian risks his new FBI job when he disobeys orders to stay out of the investigation into a renowned journalist’s murder.

When Brian helps Agents Harris and Boyle investigate the murder of a retired FBI agent, they’re shocked to find a link to the elusive head of a notorious drug cartel. Also, Brian reconnects with an old flame, Shauna but worries her renewed interest is really in the NZT version of him.

Brian's loyalty to the FBI is tested when Sands, Senator Edward Morra's representative, demands he steals the FBI's secret files on NZT. Also, Agent Harris is emotionally conflicted when she learns what her estranged father left her following his death.

Brian learns a shocking secret about Rebecca's late father but worries that telling her will land him in legal trouble. Also, Brian accidentally meddles in Rebecca's personal life while learning self-defense from her secret boyfriend, FBI Agent Casey Rooks.

When Brian begins to experience the side effects of NZT again, Senator Morra demands he betrays 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 Brian calls in sick for a day off from the FBI, the CIA abducts him from home to borrow his NZT-enhanced capabilities for a black ops mission. As the operation becomes increasingly dangerous, Brian finds himself without FBI support in a situation that's spiraling out of control.

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.

Brian offers to use NZT to capture the FBI's "Ten Most Wanted" criminals in two weeks, in exchange for Naz giving him his own personal work "headquarters" at the agency. Also, the secretive nature of Brian's new life working for the Bureau creates a rift between him and his father.

When Boyle's former military buddy is accused of murder and blames it on the loss of control of his prosthetic arm, Boyle asks Brian to help determine if the artificial limb was hacked. Also, Brian's father demands he stop working for the FBI.