Milo, Zack, and Melissa have to work together with Phineas, Ferb, Candace, Buford, and Baljeet to overcome Murphy's Law and stop the Pistachion invasion before Derek unleashes his ultimate plan, while Dakota, Cavendish, Orton Mahlson, Dr. Doofenshmirtz and Perry try to prevent the invasion in the past.
"Weird Al" Yankovic , Sabrina Carpenter , Mekai Curtis , Vincent Martella , Ashley Tisdale , David Errigo Jr. , Jeff 'Swampy' Marsh , Dan Povenmire , Jemaine Clement , Dee Bradley Baker
