'Arrow' Promo Teases the End in Dramatic 'Crisis on Infinite Earths' Crossover Event (Exclusive)

The five-episode crossover event kicks off with 'Supergirl' on Sunday, Dec. 8 at 8 p.m. ET/PT on The CW, followed by 'Batwoman' on Monday, Dec. 9 at 8 p.m. ET/PT, 'The Flash' on Tuesday, Dec. 10 at 8 p.m. ET/PT, 'Arrow' on Tuesday, Jan. 14 at 8 p.m. ET/PT and 'Legends of Tomorrow' at 9 p.m. ET/PT.