Mr. Dingley gives an assignment where the kids have to write letters to themselves 20 years into the future. Meanwhile, the gang pulls off hilarious pranks that include a wild skunk scaring a babysitter, and a target who believes he's witnessing a 3-D printer that can print out real food.

The team tries to teach Bailey's new friend Vlad the art of pulling off a great practical joke, just in time for them to pull off an epic prank involving a teacher's aide, aliens and the military.