The previously announced recurring cast members include: Christian Slater as Elliot Decker, the school
crossing guard and self - proclaimed «Safety Czar» of Jefferson G. County, who has made it his mission to protect the world from Milo; Vanessa Williams as Zack's mom Eileen Underwood; Sarah Chalke as science teacher Miss Murawski; Jemaine Clement as Dr. Zone, a popular television show
character who travels through time with his trusty sidekick Time Ape; Chrissie Fit as Amanda Lopez, an overachieving perfectionist in Milo's
class; Vincent Martella as Bradley Nicholson, Milo's envious and pessimistic classmate; Diedrich Bader as Milo's dad Martin Murphy; Pamela Adlon as Milo's mom Brigette Murphy; Kate Micucci as Milo's sister Sara Murphy; Mackenzie Phillips as Principal Elizabeth Milder; Dee Bradley Baker as Milo's dog Diogee; Brett Dalton as high - level time travel agent Brick; Gregory Michael Cipes as classmate Mort Schaeffer; Sophie Winkleman as Dr. Zone's sidekick Time Ape; Michael Culross as high school teacher Kyle Drako; and Kevin Michael Richardson as Coach Nolan Mitchell.