Episode 1: It's About Time

When hulking villainous scientist clones, the Mauler Twins, attack the White House, they are repelled by the Guardians of the Globe and Nolan Grayson / Omni-Man. Nolan's son Mark, who is waiting for his powers to emerge, goes to school and defends classmate Amber Bennett from bully Todd. After Todd beats Mark, Amber saves the latter and develops an interest in him. Later, Mark's powers of flight and super-strength emerge, and he tells his parents over dinner. While Nolan is initially uncertain, he nonetheless begins to train Mark on how to use them. However, Mark is caught off-guard when Nolan, emphasizing the severity of being a superhero, punches him too hard. Feeling hurt emotionally and physically, Mark blows off steam by stopping a robbery in a homemade suit. After a heart-to-heart with his son, Nolan takes Mark to meet superhero suit tailor Art Rosenbaum, who creates a proper superhero suit for Mark after he takes the name "Invincible". Later, Nolan secretly ambushes and kills the Guardians at their headquarters before falling unconscious from injuries sustained from their resistance.