Episode 6: ‘Red Faced’
With the stress and pressure of being Supergirl, working for the DEO and being Cat Grant’s assistant, Kara was struggling with how to cope with everything on her plate. On top of that, she was tasked to participate in a training exercise against an android, The Red Tornado, for the Army. Ultimately this exercise was to help the Army learn how to kill Kryptonians. This culminated in Supergirl unleashing her heat vision in a fit of rage and destroying the Tornado. The following episode James referred to this as a solar flare and it resulted in Supergirl being temporarily powerless.