"Death of a Prez!"
Supergirl is somehow being controlled and ordered to assassinate Prez Rickard. In the end, Supergirl find a way to avoid the mental commands and brings the villains to justice.
(*NOTE: this story takes place outside of Earth-1 or 2 continuity)
"Her Brother's Keeper!"
A misguided scientist creates a male clone of Supergirl, using him to finance his projects. In the end the boy becomes confused with what Supergirl has told him about right and wrong, and what his "father" wishes for him to do, then destroys himself.