Supergirl
Crisis on Infinite Earths, Part I
S5 E9:
The Monitor sends Harbinger to gather the world's greatest heroes - Supergirl, The Flash, Green Arrow, Batwoman, White Canary, The Atom and Superman - in preparation for the impending Crisis; Lena must find a way to save the people of Earth-38.
Starring
LaMonica Garrett, Audrey Marie Anderson, Grant Gustin