Apparently Lena and James have spent the night together. She likes waking up next to him. He thinks she should get a place and not live in a hotel anymore. They are enjoying the moment when Reign busts in. She flings James across the room and yells to find out where Ruby is. Lena sprays her with Kryptonite and she leaves. J’onn tries to help his father but Myrn is not interested. He just wants J’onn to put a record on.
At the DEO, since pestilence is gone Plywood and his team are headed back to the future. They say some awkward goodbyes and Plywood seems conflicted. Alex interrupts with news on the attack at Lena’s. They head over and talk to Lena and James. Supergirl and J’onn are dispatched to protect Sam’s mom and Winn will update the profile they have on Reign. Alex badgers Lena until she admits where Ruby is. Alex then goes to keep her safe.
Sam’s mom knew Sam was Reign. She tells Supergirl and J’onn about Sam’s childhood. She isn’t leaving now. Alex gets inside and talks to Ruby. The girl is just concerned about her mom. Alex tries to give her non-answers and then distracts her. Kara and J’onn talk about his father’s condition and what can be done. The conversation ends though as Reign turns up. She attacks. Supergirl fights back but she’s no match.
Brainiac is keeping tabs on the DEO and things are not looking up with the Reign issue. Plywood seems interested in going back but as Imra approaches he doesn’t suggest it. Kara talks to Sam’s mom in the medbay for a few moments before she dies. James visits Lena at the office and tells her about Sam’s mom. He wants Lena to go to Supergirl as an ally and tell her she can make kryptonite. Lena doesn’t want to but James pushes.
Alex gets a call. She doesn’t say much but it’s obviously bad news. Ruby comes in and assumes it’s about her mom. She wants to know what’s up and she doesn’t want Alex to lie. Alex claims she isn’t lying and suggests a movie instead. She leaves the room and Ruby notices that Alex left her phone there. Reign hovers above the city. Kara and J’onn are running out of options. They head to his place to talk to his father and how to battle.
It works. They now have a plan. Imra sends her husband back to the DEO to help his ex so that when the battle is done he can make a decision on who to be with. Lena brings the kryptonite to the DEO and as expected Supergirl gets indignant. They argue about it. Ruby sneaks outside to call her mom. She leaves a message. Reign hears her talking and heads that way. Alex comes back into the room and realizes right away that something is up.
Reign arrives at the mansion just as the others get the alert. Kara is ready to roll and tells a still injured J’onn to stay behind. He needs to be there thought to wield the kryptonite. Enter Plywood. He’s ready to help. A battle in the vault in the basement ensues. Ruby finds out that her mother is Reign. Kara brings up Reign’s code to save Ruby. It works and they take her into custody. They bring her back to Lena.
Supergirl tells Lena that she trusts her and then finds out Plywood is back to stop Reign. J’onn goes home and spends time with his father. His condition is getting worse. Alex and Ruby talk about Sam and Reign. Ruby doesn’t trust Alex because she lied but Alex gives her word it will never happen again. Kara is in the elevator when Lena comes in too. They talk about Supergirl. Turns out Lena is just working with her because she has to. She doesn’t trust her. She used James against her. That’s Lillian levels. A girl steals a book from Coville’s followers.
I hate that they are pitting Lena and Supergirl against each other. I know they are setting her up to be the next big bad and I’m not interested in that. I like them as friends. I also think Kara cannot be subtle so that will blow up in their faces anyway. Also, Alex getting schooled by a pre-teen? She left Maggie because she wants kids and she as a 12-year-old teaching her.