Crisis on Infinite Earths
Airs: at on The CW Not Yet Rated
The Monitor and Harbinger will rally the heroes from the worlds of Arrow, The Flash, Batwoman, Supergirl, DC's Legends of Tomorrow, and special guests from around the multiverse to combat an evil so dangerous and pervasive that it will call for an alliance unlike any other. Worlds will live. Worlds will die. And the Arrowverse will never be the same.