Livewire returns in preview for Supergirl Episode 2.10 The CW has released the first full promo for Supergirl Episode 2.10, which features the return of the villain Livewire! Check it out in the player below along with another general promo for the series. Titled “We Can Be Heroes,” the episode is set to premiere January 30 and is officially described as follows: “After Livewire (guest star Brit Morgan) seemingly breaks out of prison, Supergirl is intent on recapturing her.