When Mark Grayson finally inherits powers from his superhero father, it's a dream come true. But there's more to being a hero than just choosing a name and costume.

With his father out of action, Mark struggles to defend the city against an interdimensional invasion, joining forces with a team of teenage superheroes.

Mark has to cut a study date short to help save Mount Rushmore from a crazed scientist. Robot deals with Action - Comic as he assembles a new team of world-saving superheroes.

It's two firsts for Mark: a first date and a first trip to another planet. At the same time, Nolan and Debbie revisit their own first vacation together.

Feeling confident in his new abilities, Mark risks a team-up with a local villain to take down a crime lord, while simultaneously juggling school and a new relationship.

Mark joins William and Amber on a campus visit to Upstate University, hoping to discover a new future for himself. Debbie makes her own disturbing discovery.

Feeling lost and confused, Mark looks for advice from Eve. At the same time, everyone's looking for him.

Mark must prove he's become the hero he's always wanted to be by stopping an unstoppable force.