S.I.S.T.E.R. is the nineth episode of Season 1.
|Previous Episode||Trouble in Timeville Part 2|
|Next Episode||The Underwater World|
The Super Squad go to the Masters of the Arts' house and they each earn their first superhero form! Once they leave the city, they are ambushed by an evil female organization called S.I.S.T.E.R. Their first superhero forms save them and they head towards Atlantis.
- The Super Squad each earns their first superhero form
- Ace earns his "Meteorite Power"
- Roxy earns her "Sandstorm Power"
- Will Guy earns Shadow Guy
- Aquais earns "Precipitaion Power"
- Inferno earns "Incineration Power"
- Susie, Isabelle (Isa), Sally, Tess, Emma, and Rachel are intoduced as the evil organization of S.I.S.T.E.R
- This is the first time S.I.S.T.E.R. is show as a whole
- Isabelle (Isa)