Master Jailer is on a Rampage in New 'Supergirl' Promo

Cat hires a second assistant, Siobhan Smythe (Italia Ricci, right), who immediately tries to one-up Kara (Melissa Benoist, left)

After a week off for the Grammys, 'Supergirl' is back on Monday with an exciting new episode. Entitled 'Truth, Justice, and the American Way,' it'll feature the addition of new assistant Siobhan Smythe (Italia Ricci), aka the comic book villain Silver Banshee.There's also the return of Non and the debut of the episode's villain, Master Jailer (Jeff Branson), who'll be on a murderous rampage executing escapees from Fort Rozz in National City. 

The episode was written by Yahlin Chang and Caitlin Parrish. Lexi Alexander (Green Street Hooligans, Punisher War Zone) directed who's also directed episodes of Arrow and Limitless

Supergirl airs Mondays at 8 PM ET on CBS.

Supergirl does battle with the deadly Master Jailer (Jeff Branson), who is hunting and executing escaped Fort Rozz prisoners. Also, Cat hires a second assistant, Siobhan Smythe (Italia Ricci), who immediately tries to one-up Kara, and Kara and James disagree over the DEO’s methods, on Supergirl, Monday, Feb. 22 at 8/7c. Only CBS