'Supergirl' Season 5 Finale: Kara and Lena team up against Lex and Leviathan, but can Lena be trusted?

Lex has been brainwashing Lena consistently against Kara and it remains to be seen whether she will be Kara's ally
Melissa Benoist and Katie McGrath (CW)
Melissa Benoist and Katie McGrath (CW)

'Supergirl' might be ending sooner than what was planned, but it's not going to go off without some fireworks. Throughout the season, Lena Luthor (Katie McGrath) has been giving ex-BFF Kara (Melissa Benoist) a cold shoulder, because she didn't tell her that she was Supergirl. Lena joined hands with a recently-resurrected Lex Luthor (Jon Cryer), who wants to pit the Leviathan against Kara.

Of course, she refuses to see that Lex is manipulating her against Kara. But hey, looks like things might finally change for the former besties and they will join hands and save the day...or not, or at least try to. At least, that's what the synopsis for the finale suggests. Cryer has given several hints in interviews hinting that Lex might just win this round, as we saw him defeated in Season 4.

The synopsis for the 'Supergirl' Season 5 finale reads, "Supergirl (Melissa Benoist) realizes that in order to stop Lex (guest star Jon Cryer) and Leviathan she must work with the one person she never thought she’d trust again – Lena (Katie McGrath). Nia (Nicole Maines) keeps dreaming about Brainy (Jesse Rath) but struggles with what the dreams are trying to tell her. Meanwhile, Brainy realizes there is only one way to stop Lex."

Well, yikes.

Yet, Lena is Lena and considering she is so filled with hatred for Kara, it remains to be seen whether she will be an ally or betray Kara again. Lex has been brainwashing her consistently against Kara. However, this might just be the moment Supercorp fans were waiting for---to see a reconciliation between Lena and Kara. 

Apart from that, we are going to see Brainy's (Jesse Rath) female doppelganger back in action, played by the actor's sister, Meaghan Rath. "Well, in [episode] 19, my sister comes back to the show," Jesse told CBR.

"She will return to the show. So I have a handful of scenes with female Brainy, or Meaghan Rath, or whatever you want to call her. So I'm very excited to see those scenes. I always love working with my sister and I'm very grateful for her to come and do the show, so I can't wait to see those scenes."

Tune into 'Supergirl' on Sundays at 9 pm.

GET THE BIGGEST ENTERTAINMENT STORIES
STRAIGHT TO YOUR INBOX.

MORE STORIES

‘Silo’ Season 3 Episode 7 ends with major revelations about Kennedy, Knox, the Safeguard Protocol, and the mysterious origins of the silos
2 hours ago
Earlier reports indicated that Disney+ had begun development on the project in March 2025
5 hours ago
Everything you need to know about when ‘Lanterns’ premieres on HBO Max, including the release date and time.
10 hours ago
Juno Temple addresses Roy and Keeley reunion rumors in 'Ted Lasso' Season 4, with fans wondering where their relationship is headed
16 hours ago
'Lethal Weapon' famed actress joins 'Off Campus' Season 2 as Summer Di Laurentis, adding a familiar face to the story.
16 hours ago
'Heated Rivalry' star's slip-up has sparked fresh questions among the fans about the scale of Season 2, leading him to quit the platform.
17 hours ago
'American Horror Story' Season 13 brings back fan-favorite characters from across the anthology as FX reveals when the massive crossover will begin.
19 hours ago
'Tires' Season 3 adds plenty of new stars as the chaos follows them into Shane and Will's garage
22 hours ago
Jessica Lange will play all her iconic characters in 'American Horror Story' Season 13
1 day ago
The upcoming Western drama is based on Louis L'Amour's novel of the same name
1 day ago