Supergirl Season 4: Here’s What You Need To Know

As Supergirl flies into Season 4, we give you the low-down on all the twists, turns, new characters and cast changes you need to be across.

Double Trouble

This season fans can prepare for Kara (Melissa Benoist) to have her fair share of problems to deal with… perhaps one of the biggest being that her mysterious Russian double was revealed in the final moments of last season’s finale.

Supergirl is definitely putting its own spin on the comic classic Red Son, which features Kara splitting in two thanks to black kryptonite. So, not only is there Kara, but a darker or “second” side of her personality is revealed in the form of an impostor in Siberia. Stayed tuned for how that turns out…


Kara’s rejection

At the end of last season we saw Kara realise that her new home is Earth, which is only making her more and more human. However an anti-alien sentiment is growing in National City this season, which makes her feel less welcome.

This sentiment is driven by a new villain, Agent Liberty (Sam Witwer), who is the figurehead of the hate group Children of Liberty, which supports “a human first world order.” Fans would remember that in the comics Agent Liberty is a conflicted antihero trained in the CIA and working toward achieving the greater good. Slightly diverting this character from his origins could open up to some interesting conversations.


The Comic-Con trailer featured a brief flash of a woman in a cool new armoured suit with a helmet. Considering Kara doesn’t need a helmet to breathe in space, questions are definitely lingering as to what this potential upgrade could be for.

A new hero?

As the show pushes for more LGBQTI+ representation on screen, transgender activist Nicole Maines joins as TV’s first transgender superhero, Nia Nal, AKA Dreamer. Wanting to shake things up from Dreamer’s comic-book origins, Supergirl writers put their own spin on things. In the comics, Dreamer is a member of the Legion of Super-Heroes in the 30th and 31st centuries, hailing from planet Naltor, yet fans will see her appear as human while maintaining her strength and boundary-pushing qualities.

Cast Changes

This season of Supergirl will see Mon-El (Chris Wood) return to the future, likely crushing any ideas of rekindling his relationship with Kara. On his way back, he is taking Winn (Jeremy Jordan) with him in place of Braniac 5 (Jesse Rath), who is staying behind for for his own safety.

Mon El

New Faces

Brent Spiner cast in recurring role as Vice President Baker
April Parker Jones as Colonel Haley, a military woman who acts in the best interest even if it’s not her own
David Ajala as Manchester Black
Rhona Mitra as Mercy Graves
Robert Baker as Otis Graves, Mercy’s brother and right-hand man

Future of the Guardian

Last season, James Olsen (Merchad Brooks) threw his life into disarray as he publicly unmasked as The Guardian in the hope it would give confidence to those he was saving. Obviously this will drastically change things, so will people accept him or will he face intense public hatred?

Another Villain?

In Season 3’s finale, Brainiac’s “distant relative” was determined to destroy all A.I’s other than himself. Surely this is none other Brainy himself. All we can say is buckle in for more Brainy-centric storylines this season.

Supergirl S4 Starts Monday October 15 EXPRESS from the US 8:30pm on FOX8