'Supergirl' season 1 episode 19 spoilers: Kara tries to stop the returning Non and Indigo in 'Myriad'

In Season 1 Episode 19 of “Supergirl,” Kara/Supergirl (Melissa Benoist) will battle the mind-controlling duo, Non (Chris Vance) and Indigo (Laura Vandervoort) and stop them from proceeding with “Myriad.”

Previously, Supergirl helped The Flash return to Earth-1 and also worked with him to battle a couple of enemies in the crossover episode titled, “Worlds Finest.” Barry Allen (Grant Gustin) made an appearance in National City and fought against Livewire (Brit Morgan) and Silver Banshee (Italia Ricci). The two enemies worked together to bring down Cat Grant and Supergirl but failed.

During the final moments of the “Worlds Finest,” Barry and Kara had a sentimental conversation with the former giving her some advice on how to let James Olsen know her feelings about him. She eventually found it hard to tell James and ended up kissing him. When they kissed, however, Non and Indigo already controlled the minds of James and other citizens of National City. The next episode will most likely showcase more about the developing relationship between Kara and James.

“Kara must find a way to free her friends when Non and Indigouse mind control to turn National City's citizens into their own army,” states the episode synopsis on CBS.

In the penultimate episode of Season 1, titled “Myriad,” there will be returning villains, namely Non and Indigo, who will get ready to attack National City.

Cosmic Book News provides a number of preview images from the episode. There are scenes of Supergirl talking to Cat Grant (Calista Flockhart) and Non. A few photos also show Jimmy Olsen (Mehcad Brooks) on the ledge of the office building as if dropping backwards with his arms spread out. Is he going to fall to his death? Is he going to be the victim of the villains’ mind control powers?

Heavy writes that Supergirl will fight Non and Indigo in the last two episodes of Season 1. She will attempt to stop the two villains from executing their “Myriad” plan. Myriad is the alien technology that subjects the whole city under the influence and control of Non.

“Supergirl” will air next on Apr. 11, 2016 on CBS.