Grant Gustin performed in a Fox television series.
Glee is a musical comedy-drama television series that aired on Fox in the United States for six seasons from 2009 to 2015 . Glee is an American musical comedy-drama television series that aired on the Fox network in the United States from May 19 , 2009 , to March 20 , 2015 . Grant Gustin . He is known for his role as Barry Allen / the Flash ( based on the DC Comics character of the same name ) on the CW series The Flash and Arrow , both in the Arrowverse television franchise , and his role as Sebastian Smythe on the Fox series Glee .