The Fall Of Vulcan

Vulcan, a renowned hero throughout the Galaxy, was created by the last of the Vulcanians to seek revenge against the white Martians after they unleashed a deadly virus that caused the Vulcan race's extinction, though this remains unknown to many. Universally seen as an immortal champion, he arrives on Earth, where J'onn and Kara eagerly join his quest to capture two criminal white Martians they have encountered before. However, when they find the villains, Vulcan's programming activates, prompting him to attack them and their child, forcing J'onn and Kara to protect the criminals and confront their supposed hero.