A bitter, formerly world-renowned dentist is bent on revenge against those who destroyed his practice. Armed with bizarre dental equipment, he turns his victims into dental disasters – including the spies. In a B-story, Mandy goes broke.

A hot new yoga instructor is gaining popularity, along with hordes of intensely committed followers. As this almost cult-like group tries to recruit more followers through the use of force, the spies are put on the case. They soon find out that the mysterious figure behind the craze is none other than Shirley, the POWER YOGA CHI-KWON-DO instructor from ep #034 ""Boy Bands."" Can the spies stop Shirley and her super charged army of power yoga loyalists before they take over the world? In a b-story, Sam is failing gym class because she can't climb to the top of the rope and it's in jeopardy of throwing off her entire GPA.

The girls find themselves between a rock and a hard place. There's no way they're taking out Jerry and simultaneously, they've got to save Dean. What are they going to do?

The spies face Terence and Dean in Beverly Hills for a final showdown in which even the best of spies will have trouble succeeding.