What's The Worst That Quad Happen? is the tenth episode of Season 3.
When a curse hits the Harper house, thunder goes off and everything turns out bad for the family, the family is trying to find out how this all started, so they retraced all the steps before the curse to try and stop the curse.
- Aidan Gallagher as Nicky Harper
- Casey Simpson as Ricky Harper
- Mace Coronel as Dicky Harper
- Lizzy Greene as Dawn Harper
- Allison Munn as Anne Harper
- Brian Stepanek as Tom Harper
- Kyla Drew Simmons as Mae Valentine
- This episode was at 7:30PM before Thundermans: Banished!