The CW has released an Executive Producers’ preview for the mid-season finale of Supergirl, which you can check out below. The installment, titled “Reign,” is officially described as follows:
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REIGN CHALLENGES SUPERGIRL – Supergirl (Melissa Benoist) investigates a mysterious symbol popping up all over National City, tracing its origins back to an ancient prophecy and the mark of the World Killer, Reign (Odetee Annable). Meanwhile, the tension between Lena (Katie McGrath) and Morgan Edge (guest star Adrian Pasdar) continues to build, causing James to step in and offer up some protection, and possibly igniting a spark in the process.
“This mark mysteriously starts appearing all over National City,” EP Robert Rovner previews. “Begins in a crop circle-y kind of way and so everybody is kind of freaked out and wondering who’s making the mark.”
“Kara is still very much grappling with the fact that Mon-El has reappeared with this beautiful lovely wife named Emra,” says EP Jessica Queller. “We really have three good people — Emra, Mon-El, and Kara — stuck in this untenable situation.
Supergirl, “Reign,” was directed by Glen Winter and written by Paula Yoo & Caitlin Parrish. The episode airs Monday, December 4, at 8pm on The CW.