Supergirl 2x21 sneak peek #2 "resist" (hd) season 2 episode 21 sneak peek #2

The cw has provided comicbook com with an exclusive preview of "resist," tonight's penultimate episode of supergirl season 2

in the clip, seen above, lena luthor (katie mcgrath) faces off with rhea (teri hatcher) the pair formed a fast bond, as rhea needed lena's engineering skills to enact a part of her grand plan for national city and in order to woo the girl over, came on as the maternal mentor lena needed especially after having played a key role in sending her biological mother (played by brenda strong, and also appearing this week) to prison