In the Limitless episode “Fundamentals of Naked Portraiture” a developer at a tech think tank is murdered. Brian Finch (Jake McDorman) and FBI agent Rebecca Harris (Jennifer Carpenter) are sent to find clues to the killer’s identity. After interviewing a robotic version of the victim, which she created before her death, they meet a mysterious man named John.
John is portrayed by Tate Donovan. Donovan is best known for his roles on Masters of Sex (Graham Pennington), 24: Live Another Day (Mark Boudreau), Hostages (Brian Sanders), Deception (Edward Bowers), The O.C. (Jimmy Cooper), and Friends (Joshua). Donovan is also recognized for his roles in the films Argo, Shooter, and Good Night, and Good Luck. Limitless airs Tuesdays at 10pm on CBS.