Superstar JoJo Siwa is transformed into The Substitute! Students on a space center field trip have a close encounter with Substitute staffer JoJo undercover as an unusual robot, a Pluto super fan, and a nerd who needs a major confidence boost.

Actor Cooper Barnes goes undercover as The Substitute where he is transformed into three outrageous characters: an archeologist who thinks he's psychic, a wacky motivational speaker, and a paranoid spy.