"Fungus Among Us" is the nineteenth episode of Milo Murphy's Law. It premiered on September 30, 2017.
Milo, Cavendish, and Dakota travel back to 1965 and inspire the creation of Dr. Zone only to encounter a sinister plot to take over the world.
- "Weird Al" Yankovic as Milo Murphy
- Sabrina Carpenter as Melissa Chase
- Mekai Curtis as Zack Underwood
- Jeff "Swampy" Marsh as Balthazar Cavendish
- Dan Povenmire as Vinnie Dakota and Heinz Doofenshmirtz
- Dee Bradley Baker as Diogee
- Diedrich Bader as Martin Murphy
- Pamela Adlon as Brigette Murphy
- Kate Micucci as Sara Murphy
- Ming-Na Wen as Savannah
- Phil LaMarr as Marcus Underwood
- Jemaine Clement as Orton Mahlson
- Gregory Michael Cipes as Mort
- Heinz Doofenshmirtz, a character from Phineas and Ferb, another show from Dan Povenmire and Jeff "Swampy" Marsh, appears in this episode.