Supergirl Faces An Old Enemy In We Can Be Heroes Promo

It looks like Livewire, Kara's sparkiest foe, is set to make a return to National City in the upcoming tenth episode of "Supergirl's" second season.

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The episode may be titled "We Can be Heroes," but it looks like Supergirl may actually struggle to subdue Livewire in a suitably superheroic fashion. In the promo for the episode, the electrically-powered super villain promises Kara "I'm going to murder you."

The promo also comes with the following synopsis:

After Livewire (guest star Brit Morgan) seemingly breaks out of prison, Supergirl (Melissa Benoist) is intent on recapturing her. After training Mon-El (Chris Wood), Supergirl takes him with her when she sees Livewire attack the NCPD but things go awry when Mon-El puts Supergirl before the citizens of National City. Meanwhile, James (Mehcad Brooks) decides to come clean with Kara and M’Gann (guest star Sharon Leal), has a psychic attack and collapses into a coma.

Starring Melissa Benoist as the Girl of Steel, “Supergirl” airs Mondays at 8 pm ET/PT on The CW. The series also stars David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, Chyler Leigh as Alex Danvers and Jeremy Jordan as Winn Schott and features appearances by Calista Flockhart’s Cat Grant as well as Tyler Hoechlin’s Superman.

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