The second season of the American television series Arrow premiered on The CW on October 9, 2013, and concluded on May 14, 2014, with a total of 23 episodes. The series is based on the DC Comics character Green Arrow, a costumed crime-fighter created by Mort Weisinger and George Papp, and is set in the Arrowverse, sharing continuity with other Arrowverse television series. The 2012 fall season debut of "Arrow" brought the highest ratings its network had seen in three years. Episodes Arrow. Release year: 2012. Presumed dead for five years, a billionaire returns a changed man. 8. The Scientist 42m. After a seemingly impossible robbery at Queen Consolidated, Central City's police scientist Barry Allen offers to help Oliver and his team.