“Phineas and Ferb” follows the inventive stepbrothers as they tackle another 104 days of summer. Candace is more determined than ever to finally bust her little brothers, while their pet platypus, Perry, continues to lead a double life as the suave “Agent P,” whose sole mission is to thwart Dr. Doofenshmirtz from taking over the Tri-State Area. The new season will premiere June 5 on Disney Channel and June 6 on Disney+.