Here's some scoop on Supergirl from Entertainment Weekly's Natalie Abrams' The Spoiler Room column, which was posted on 3/3/17.
What can you reveal about Alex in next week’s Supergirl? — Charlie
Well, she’s going to some dark places in the wake of learning her father is colluding with Cadmus. “It’s hard because when they realize that there’s a deeper issue going on with Jeremiah, you don’t really know where his loyalties lie,” Chyler Leigh says. “When that’s questioned and Alex gets put in a position where she’s questioning it, it becomes this deep, dark intense realizing, her coming to grips with the fact that this isn’t in her control. Basically, Alex goes head-to-head with Lillian Luthor, so it’s a really powerful episode.”
Link to the full article:Spoiler Room: Scoop on 'Once Upon a Time,' 'Arrow,' 'Supergirl' and more