Season 1, Episode 3: Fight or Flight

Season 1, Episode 3
Fight or Flight

Original air-date: 9 Nov. 2015
Directed by: Glen Winter
Written by: Jerry Siegel

Synopsis:
Supergirl’s powers are put to the test when one of Superman’s most formidable enemies, Reactron, shows up in National City to take her down. In the meantime, Cat makes plans to run an expose on Supergirl.