The third season of the American television series The Flash, which is based on the DC Comics character Barry Allen / The Flash, a costumed superhero crime fighter with the ability to move at super-speeds, follows Barry, a crime scene investigator who gains superhuman speed, which he uses to fight criminals, including others who have also acquired superhuman abilities. It is set in the Arrowverse, sharing continuity with other TV series in the universe, and is a spin-off of Arrow. The season was produced by Berlanti Productions, Warner Brothers Television, and DC Entertainment with Andrew Kreisberg, Aaron, and Todd Helbing as showrunners.
The season was ordered in March 2016, and production began in July and ran until April 2017. Along with Grant Gustin, who reprises his role as Barry Allen, the main cast of Candice Patton, Daniel Panabaker, Carlos Valdez, Tom Kavanagh, Jesse L. Martin and Keynan Lonsdale return from the second season.
The first episode of the season premiered on the CW on October 4, 2016, and was watched by 3.17 million people, with the season consisting of 23 episodes. The series was renewed for a fourth season on January 8, 2017.
