The CW will give audiences extra chances to catch The Flash.
The CW is re-airing the Arrow episode that introduced Barry Allen tonight.
The CW will be re-airing Grant Gustin's Arrow debut as Barry Allen.
Grant Gustin filmed a promo for tonight's episode of Arrow, titled The Scientist
Preview clip and interview with Grant Gustin about the Arrow episode The Scientist
Promo trailer for the Arrow episode The Scientist, featuring Grant Gustin as Barry Allen
Images from the Arrow episode The Scientist featuring Grant Gustin as Barry Allen
Official CW description for the Arrow episode The Scientist, featuring Grant Gustin as Barry Allen, The Flash