WATCH: Inside The CW's CRISIS ON EARTH-X THE FLASH

The CW Network has shared an inside look from the THE FLASH episode of the crossover event CRISIS ON EARTH-X. The TV event features crossover episodes of THE FLASH, SUPERGIRL, LEGENDS OF TOMORROW and ARROW. Stream all 4 crossover episodes from Crisis on Earth-X for FREE only on The CW App!

Watch here for Inside: Crisis on Earth-X - The Flash:

Based on characters from DC's The Flash. After the S.T.A.R. Labs Particle Accelerator explosion, a DARK MATTER lightning storm strikes Central City C.S.I. Barry Allen, bestowing him with super-human speed. For now, only a few close friends and associates know that Barry is literally the fastest man alive, but it won't be long before the world learns that Barry Allen has become...The Flash.