Supergirl 2×08 “Medusa” Sneak Peeks

The promos for this week’s CW shows have all been focused on the big 4-night crossover event, with no solo promos being released for each show. Monday’s Thanksgiving-themed Supergirl episode will not be a big part of the crossover, so we don’t know a lot about it beyond the official synopsis (below). The CW has instead released two sneak peeks, although neither tells us much about the episode. The first clip takes place at the dinner table as James and Alex vie to reveal their big secrets before being interrupted by the portal which we know will bring Barry and Cisco into Kara’s universe (which you can see in these official promo photos).

Eliza (guest star Helen Slater) comes to town to celebrate Thanksgiving with her daughters. Alex decides it’s time to come out to her mother; Kara is shocked when Eliza suggests Mon-El has feelings for her, and Winn and James 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. The epic superhero crossover kicks off 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.