The CW's annual crossover is quite an undertaking this year. Crisis on Infinite Earths is a 5-part crossover that encompasses five shows, and countless number of characters. The Flash, Green Arrow, Supergirl, Batwoman, and Legends of Tomorrow all take part. Plus, cameos from all over DC's legacy make appearances, including Brandon Routh as Superman and Tom Welling as Clark Kent. Plus, Burt Ward and Kevin Conroy also play key roles.

Seth and Victor go through the first three parts, and what worked and what didn't in the Crisis on Infinite Earths.