Superboy (2011-2014) #25

Krypton Returns!' part 2, continued from ACTION COMICS (2011- ) ANNUAL #2. Our heroes have been sent on missions through Krypton's history to stop H'El from dooming the universe! Superboy's mission? Stop H'El from tampering with the history of Krypton days before its explosion. Continued in SUPERGIRL (2011- ) #25.