Sigma Sigma was invaded by Splitface when Splitface got in the Black Hole Orb Staff. Sigma Sigma was safe after Mark Surge caught & cuffed Splitface. And it was safe before Splitface got into the Black Hole. The two fire villains, Jetbug & Fire Lord, however, freed Splitface from Stringer when Stringer caught up to Splitface.
- Sigma Sigma Sector - The Sigma Sigma Sector in the Lego toyline Hero Factory.