The four-night DC TV crossover kicks off with Supergirl Season 2 episode 8, “Medusa.” Most of the episode will be Supergirl flying around National City as usual, but at the end, she’s going to make her way over to the Arrowverse. Once The Flash realizes Earth is being invaded by an alien race named The Dominators, he knows he’s going to need Supergirl's help to defeat them.
MAJOR SPOILERS AHEAD
The “Medusa” synopsis reveals Vibe and The Flash will open a breach and go over to National City to get Supergirl, officially kicking off the event Monday night.
A NIGHT OF CONFESSIONS; THE EPIC SUPERHERO CROSSOVER KICKS OFF TONIGHT — Eliza (guest star Helen Slater) comes to town to celebrate Thanksgiving with her daughters. Alex (Chyler Leigh) decides it’s time to come out to her mother; Kara (Melissa Benoist) is shocked when Eliza suggests Mon-El (Chris Wood) has feelings for her, and Winn (Jeremy Jordan) and James (Mehcad Brooks) consider telling Kara the truth about the Guardian. Meanwhile, CADMUS unleashes a virus that instantly kills any alien in the vicinity so Kara enlists an unexpected ally – Lena Luthor (Katie McGrath).
The epic superhero crossover kicks off tonight when Barry Allen (guest star Grant Gustin) and Cisco Ramon (guest star Carlos Valdes) seek Kara’s help with an alien invasion on their Earth.
While we know Supergirl will be working with Arrow and The Flash, we don’t know about the rest of her team, especially Martian Manhunter. We can only hope Guardian, Winn, and Mon-El tag along too!
Supergirl airs Mondays on The CW at 8 p.m.
