The most climactic and earth-shattering story arc in INVINCIBLE history starts here! Events in issue #11 changed the status quo of this title forever and this arc will result in even more changes. Reality is not as it was, things are changed, and Mark comes face-to-face with his favorite imaginary hero, Science Dog – but how is that even possible? PLUS! A stand-alone Science Dog back-up story drawn by INVINCIBLE co-creator CORY WALKER!