SUPERGIRL: There's No Way Out In The New Promo For The Midseason Finale; "Fear Knot" Following a trip to the past, it looks like next week's midseason finale of Supergirl is shaping up to be quite a big one as Kara makes a last-ditch effort to escape the deadly Phantom Zone! KingPatel | 5/5/2021 While we're not quite at the midway point of Supergirl's sixth and final season just yet, it looks like next week's installment will indeed serve as the midseason finale and it looks to be a doozy of an hour as Kara (Melissa Benoist) makes a last-ditch effort to escape the Phantom Zone before time runs out.Â