Krane is back and he has succeeded in turning the entire adult population of New York into kids and the kids into adults. Only bionic humans are immune. It is up to Chase and Maya to restore their families and everyone else to normal before it's too late. But it requires finding Krane's hiding spot to reverse it, and that isn't easy.
Main Cast Edit
- Jake Short as Oliver Quimby/Fletcher Quimby
- Selena Gomez as Alex Russo
- Landry Bender as Cyd Ripley
- Rowan Blanchard as Riley Matthews
- Cole Sprouse as Cody Martin
- Bradley Stephen Perry as Kaz Duncan
- Jake T. Austin as Max Russo
- Lauren Taylor as Shelby Marcus
- Sabrina Carpenter as Maya Hart
- Dylan Sprouse as Zack Martin
- Kelli Berglund as Bree Davenport
- Gus Kamp as Barry Eisenberg
- Peyton Meyer as Lucas Friar
- Debby Ryan as Bailey Pickett
- Tyrel Jackson Williams as Leo Dooley
- Ricky Garcia as Naldo Montoya
- Corey Fogelmanis as Farkle Minkus
- Brenda Song as London Tipton
- Uriah Shelton as Josh Matthews
- Paris Berelc as Skylar Storm
- William Brent as Chase Davenport
- Sabrina Carpenter as Evie Matthews
- William Brent as Douggy Matthews
- Graham Shiels as Victor Krane
- Maria Canals Barerra as Theresa Russo
- Will Friedle as Eric Matthews
- Ariel Winter as Tina Figgenbottom
- The title and premise are references to William Brent and Ariel Winter's film, Opposite Day.
- Chase references this by saying to Tina, "I feel like we've been through all this before". Technically, however, he could have also been referring to becoming kids in Prodigious.
- Bionic humans are immune to powerful personality-swapping scientific spells.
- This is a birthday episode for Duggie Davenport.