Question: "Medusa" is the eighth episode of the second season from The CW television series "Supergirl", which aired on which date, the episode features a minor tie-in with the Arrowverse crossover event "Invasion!"?
Sentence (from "Invasion! (Arrowverse)"): sees Barry Allen recruit Kara Danvers / Supergirl to his Earth to help his team, Oliver Queen and his team, and the Legends to defeat the alien race known as the Dominators.
Relevant evidence: No