J’onn Warns Kara About Her Potential Team Up In New Supergirl “Fort Rozz” Sneak Peek

A brand new sneak peek from the new episode of Supergirl has been released. This new episode is titled “Fort Rozz” and it will air tonight, January 22.

In this new sneak peek, Livewire and PSI are brought to Supergirl in order to team up against Reign. However, J’onn has some advice for Kara.