VIDEO: The CW Shares 'Barry Allen' Teaser For Upcoming Elseworlds Crossover

Elseworlds, the 3-night crossover event, begins Sunday, December 9 on The CW! Stream free only on The CW App.

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.

The CW Television Network features the hit series Riverdale, as well as Black Lightning, The Flash, Arrow, Supergirl, DC's Legends of Tomorrow, Supernatural, Jane The Virgin, Crazy Ex-Girlfriend, The 100, iZombie, Dynasty.