Summary: Sector T was infected by a horde of parasite mustaches that take over their victims' minds and change the way they act and talk. Sector V tries to avenge their teammates by finding out where the mustaches came from. They investigate the building that has a giant mustache on it and the security and C.E.O. are infected as well. The mustaches reveal their true plan to take over the whole world. Soon the Head Mustache takes over Numbuh 3 but she and the others are freed. The Mustaches tell their sad story that their previous owners had abandoned them and they tried to look for some new faces. Numbuh 3 takes pity on them and Sector V moves the mustaches to the Antarctic where they take over the penguins as their new faces.