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Pilot is the first episode of the first season of Limitless.
When his father becomes seriously ill, Brian Finch realizes he has not reached the goals that he had set for his life. His friend Eli offers him a pill of NZT, which helps Brian excel in his temp job and discover the true nature of his father's disease. When Brian finds Eli dead from a gunshot, he becomes the main suspect in an FBI murder investigation. Looking for more NZT, Brian tracks down one of Eli's coworkers and gets shot in the leg by the real murderer. He passes out, and awakes to find himself with Senator Eddie Morra, who offers him access to both NZT and a drug to counter its dangerous side effects, on the condition that he not tell the FBI. Brian looks back and finds a way to prove his innocence. He "robs a bank" and shows the FBI some NZT pills with Eli's blood on it, leading to the murderer, Adam Honeycutt, to be arrested. The FBI wants to find out who created NZT and how to counter the side effects, and FBI agent Rebecca Harris offers Brian a consultant position with the Bureau. Brian insists that they first help his father get an immediate liver transplant. Agent Harris reveals a personal reason behind her involvement in the investigation: she suspects that her father was using NZT before he was found dead.