Supergirl
Episode 2.8 “Medusa”
Directed by Stefan Pleszczynski
Written by Jessica Queller & Derek Simon
Created by Greg Berlanti, Andrew Kreisberg, Ali Adler
Starring Melissa Benoist, Calista Flockhart, Chyler Leigh, Mehcad Brooks, David Harewood, Jeremy Jordan, Helen Slater
CBS
Air date: Monday, November 28th, 2016, 8:00pm ET

The week we have been waiting for is here! Ever since Supergirl moved to The CW this season, we have been waiting for our DCTV to do what it does best – crossovers. Anticipated all season, this week the four shows: Supergirl, The Flash, Arrow, and Legends of Tomorrow cross up and down and all around. But first… Supergirl and her National City team have to stop Cadmus.

Spoilers below.