written by Cara Russell

SPOILER WARNINGS ARE IN EFFECT

We’re on the second-to-last episode of Season Three this week, and things are heating up with lots of action. The evil Kryptonian witch coven has stolen a ship and ditched Argo City for Earth, leaving Kara and Mon-El stranded without a way to phone home, and the home team blissfully unaware of what’s about to go down.

While things seem quiet, J’onn and M’yrnn begin the transfer of memory ceremony which, according to Martian spiritualism, will ensure M’yrnn’s immortality through the memories J’onn will now bear. It’s bittersweet, with J’onn resisting the end of his father’s life, and compounded when they reach the memories of the war and genocide committed by the White Martians. J’onn doesn’t want to have his father re-live those memories, but M’yrnn wants to ensure they aren’t forgotten, or the lessons they taught him unlearned.

Kara manages to interface with the holographic AI version of Alura back on Earth, sending a message to Winn who forms a plan to create a portal directly to Argo. Of course, just as he digs in, the Dark Kryptonians show up looking for the Purity and Pestilence blood samples needed to resurrect the Worldkillers and turn Earth into a new Krypton.

Winn succeeds at the last moment, allowing Kara, Mon-El and Alura to confront the evil trio. However, we lose Agent Demos, who’s been a familiar face in the background of the DEO headquarters throughout Season Two and Three. Winn blames himself since Demos trusted one of Winn’s new shield gadgets to withstand three sets of heat vision at once. To be honest with you, I blame Winn too for not testing edge cases. We’ve had far more than three hostile Kryptonians in a room before; it wouldn’t have been a reach. Instead, the single Asian guy on the entire show (who rarely has lines and I can’t even remember hearing his name before) is killed off in a split-second for a main cast member’s pain and angst. It casts a pall on this episode, I tell you.

While the Dark Kryptonians are run off without the blood samples, Selena uses her own blood to complete the ritual, giving Reign a new corporeal body independent of Sam’s (although the two are still linked on a cellular level, and Sam is in ill health because of it). They waste no time in starting to transform Earth, but as our hour is up, we’re left with a high-stakes cliffhanger as Sam and M’yrnn both maneuver into position for a heroic sacrifice. I can only hope they get to have an active role in their probable demise.

Supergirl airs Monday nights at 8 Eastern/7 Central on the CW. Cara can be reached on Twitter @virtualcara.