Continuity mistake: Maggie comes to Alex's apartment with pizza. When Alex opens and closes the pizza box, she folds the pizza box edges in and 3 shots later the edges are outside of the box.
Supergirl (2015)
1 mistake in Medusa
Starring: Calista Flockhart, Melissa Benoist, Mehcad Brooks, David Harewood
More quotes from Supergirl
Trivia: The episode "Exodus" introduces Mon-El's father Lar Gand. In DC comics, Lar Gand was the birth name of Mon-El.
Question: Why did they change her costume and hair style?
Answer: I can't say for certain, so I'm surmising that the change was to "catch up" with the other Arrowverse shows, particularly Arrow and The Flash, whose lead characters have undergone various upgrades and redesigns of their superhero suits over the years; after four seasons, Kara's probably just felt a little stale. And I believe the change in hairstyle was Melissa Benoist's personal decision and had nothing to do with the character.
Answer: Another part of why the change was that it's cold in Canada in the winter and the old costume didn't protect her from it, whereas the new one is nice and warm.