Just re-watching the pilot and it struck me how similar actresses Karen Philipp (Lt. Dish) and Helen Slater (Supergirl) look.

http://c4.ac-images.myspacecdn.com/images01/58/l_85a5940b2aa4d1cca0d5edc2dec251a7.jpghttp://2.bp.blogspot.com/_pTEqQ1ZXJOM/SRzOG-zsOBI/AAAAAAAABjg/2YIMZZrvojA/s400/slater+helen.jpg

They even have similar sounding voices, with a raspy quality about them.

Just throwing this out there.