In DC Comics, The Atom (similar to Marvel’s Ant-Man) has the power to alter the size of his body and can shrink down to subatomic levels.
On the show, Ray Palmer (Routh) is a billionaire who lost his fiance to Slade Wilson’s (Manu Bennett) soldiers. After taking over Queen Consolidated, he’s been toying with the idea of becoming a superhero — but he has needed Felicity’s (Emily Bett Rickards) scientific skills to complete the suit. Last week, she finally gave in and decided to help, despite her reservations that he might come to harm.
Ray Palmer and Felicity will both appear in an episode of The Flash, later this season.