Jesse L. Martin, known for his role in the Law & Order franchise, discusses his new role as a behavioral psychologist in the upcoming NBC series, The Irrational. Martin plays Professor Alec Mercer, a leader in behavioral science who solves crime cases using his understanding of the human mind. Martin describes his character as an "emotional detective" in the show. Although he has no interest in criminal psychology in real life, Martin is excited to play this role and was drawn to the emotional depth of the script. The Irrational premieres on September 25 on NBC.