Written by Sterling Gates Cover by Joshua Middleton; Art by Jamal Igle and Keith Champagne

"Who is Superwoman?" part 2!
The mystery of the year continues! Supergirl uncovers a vital clue to Superwoman's identity, but the Woman of Steel is more than willing to fight to protect her secrets! Plus, just what is Reactron up to – and what does a certain Metropolis police inspector have to do with it?