The CW has released the description for the seventeenth episode of Season 4 of “Supergirl”.
Titled “All About Eve” this episode is scheduled to air on The CW in the USA on Sunday, March 31 at 8.00pm ET/PT.
SUPERGIRL FACES HER BIGGEST CHALLENGE YET
Supergirl (Melissa Benoist) must deal with the destructive aftermath of Lex’s (guest star Jon Cryer) nefarious plans. Shocked at what Lex has created, Supergirl faces her biggest challenge yet.
Ben Bray directed the episode with story by Gabriel Llanas and teleplay by Katie Rose Rogers & Brooke Pohl.

I wonder if they are talking about a red sun that Lex might create. If so, I also wonder if Supergirl’s Russian lookalike will be affected by it as well as Supergirl.