Look What's Happened to Mad Science U

In this epic sequel to Welcome to Mad Science U, displaced normie Kevin Landon and his hyper-brilliant classmates are compelled to violate the laws of time itself to save one of their own, taking them on a wild journey through a menagerie of potential futures, the prehistoric past, the cesspool NYC of the 1970s, and finally to the year 1880, where they meet the enclave of mad geniuses who will one day found Mad Science U.
But when their time machine is irreversibly damaged and will only travel further into the past, how will they ever get home again???