Here's some scoop on Supergirl from this week's (Posted on 2/28/17) Ask Ausiello column.
Question: I’m so excited to see Teri Hatcher on Supergirl! How much longer do I have to wait? –Camille
Ausiello: Not much longer, Camille! According to executive producer Andrew Kreisberg, Hatcher’s character — which remains shrouded in mystery — pops up in Episode 15. As for whether or not you can expect to see her sharing the screen with former Lois & Clark co-star Dean Cain, Kreisberg says that everyone involved wants it to happen, adding “there’s a plan” in the works.
Question: Any word yet on if/when Calista Flockhart might be reprising her role as Cat Grant on Supergirl? —Avery
Ausiello: I wouldn’t put money on seeing Cat again this season. But if you do, keep the wager under $1.
Question: Anything you can tease about Iris’ role in the Supergirl/The Flash musical crossover? —Fowsia
Ausiello: “She plays a pretty key role in the musical episode (airing Tuesday, March 21). The story really centers around Iris,” co-showrunner Aaron Helbing tells Matt Mitovich. He then reiterated, “Aside from Barry and Kara, Iris plays a huge role in the musical.”
Link to the full article:‘Nashville’ Season 5: Rayna Death Spoilers — Replacement Character? | TVLine