|"Johnny's New Baby Sisters"|
|Season 4, Episode 1a|
|United States Airdate:||November 9, 2009|
|Canada Airdate:||September 10, 2009|
"Johnny X: The Final Ending"
Susan and Mary purposely turn themselves to twin babies while their parents were out. Irresponsible baby sitter Gil take care of them. Johnny had to take care of baby Susan And Mary Test from irresponsible baby sitter Gil. This interferes with a party he and Dukey had been planning. Then when Gil was giving babies spicy food, Susan And Mary written the crack code to get them back into teens again.
- This is the first episode of Season 4.