The CW has released an official description with spoilers for the January 30 episode of Supergirl.
Livewire returns in the episode which is called “We Can Be Heroes.”
LIVEWIRE IS SET LOOSE UPON NATIONAL CITY — 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. Rebecca Johnson directed the episode written by Caitlin Parrish & Katie Rose Rogers (#210). Original airdate 1/30/2017.
Supergirl returns with new episodes January 23 – see some photos here.