Candace and Dr. Doofenshmirtz with the do-over-inator.
The "Do-Over-Inator" is an inator made by Heinz Doofenshmirtz that played a big role in "Last Day of Summer". In fact, the main story of that episode is entirely surrounded by this inator.
The loop is first seen in Doofenshmirtz's home. Candace visits the place to return some DVDs she borrowed from Vanessa. In the meantime, she meets Vanessa's father and sees the "Do-Over-Inator". Candace somehow activates it to try to bust her brothers after failing in the last day of summer vacation. As a result, a 'loop' is created where time keeps on starting from the beginning of the day, of which everyone except Candace and Dr. Doofenshmirtz is unaware. The inator sucks in objects or people which are then forgotten by everyone excluding the two. Each time the day gets started, it begins at a later period and the duration of each day of the loop decreases. At the end of the episode, Candace and Doofenshmirtz along which their acquaintances successfully finish the inator. This ends the loop.
