(W) Sterling Gates, Greg Rucka (A) Jamal Igle (CA) Joshua Middleton Supergirl and Flamebird must work together to track down Kara's father's assassin- Reactron! But these childhood friends find themselves at each other's throats in these stories from SUPERGIRL #43 and #45-47, ACTION COMICS #881-882 and a story from SUPERMAN SECRET FILES 2009 #1.