Lex attempts to take control of half the population of Earth, as the first step in his plan to "fix" the universe.

While Lex faces trial for his crimes, J'onn and Alex try to access the Phantom Zone to rescue Supergirl.

Supergirl makes a new ally. Lena and Lex battle for control of Luthor Corp.

Supergirl finds an opportunity to escape from the Phantom Zone but it comes with some dangerous strings attached; Lena joins the Super Friends on a mission but finds she disagrees with their plan of action.

Brainiac-5 and Nia time-travel to 2009 Midvale to get a sample of Kara's DNA.

Young Kara experiences kryptonite for the first time, Nia and Brainy are trapped by invading aliens, and a young Cat Grant may be the reason Supergirl never gets out of the Phantom Zone.

As the Super Friends brave the Phantom Zone to bring Supergirl home, each member of the team is confronted by visions of their worst fear.

Kara copes with returning to Earth, with Zor-El posing as her uncle.

Supergirl hunts down alien prisoners on a work-release program, while Kelly investigates one of their younger brothers.

Supergirl struggles to save affordable housing, so Orlando and Joey have a place to live. Meanwhile, Nxyly plots to regain her powers.

Nxyly attempts to reunite the Allstone using Mxyzptlk as a power source. Meanwhile, Lena finds out the truth about her mother.

The people of the Heights are affected by the building collapse, and a new hero emerges to protect them.

Supergirl and Nxyly battle for the Totem of Courage, and each get part of it. The part that Supergirl acquires causes chaos.

Nxyly gets hold of the Humanity Totem, causing chaos throughout National City. Meanwhile, Esme meets her new foster family and Lena attempts to cast her first spell.

Supergirl continues to fight Nyxly for the remaining totems but after Nyxly kidnaps William, Supergirl realizes she needs to take a more proactive stance to keep National City safe. Meanwhile, Alex faces the biggest challenge of her life.

Nxyly goes after the Dream Totem, and Nia must join forces with her sister Maeve to stop the imp. Meanwhile, Supergirl worries that she's being pulled in too many different directions.

When Lex Luthor appears by Nyxly's side, Supergirl and team must deal with the emotional fallout of facing their two biggest foes at the same time. Alex makes plans for the perfect proposal to Kelly, but work keeps getting in the way.

Supergirl and the super friends take drastic action after a loved one is kidnapped by Nyxly and Lex; an unlikely ally steps in to help the team.

In the epic series finale, Supergirl is joined by familiar faces from the past to help her stop Lex and Nyxly for good. Meanwhile, Alex and Kelly prepare to walk down the aisle.