Question: Tom Degnan has had a recurring role on which CBS show about a drug that unlocks the full potential of the human brain, giving its user enhanced mental faculties?
Sentence (from "Limitless (TV series)"): Limitless is an American comedy-drama television series based on the 2011 film of the same name, which originally aired on CBS from September 22, 2015 to April 26, 2016.
Relevant evidence: No