|US||2007||15||Comedy . Animation . Family . Sci-Fi & Fantasy|
The boys build a roller-derby rink for their grandma, who once was on a championship derby team, so she can skate against her onetime rival. Meanwhile, Doofenshmirtz believes a statue of a bearded man is mocking him because he can't grow facial hair, leading him to create a machine to solve his problem for him.
|Episode Title:||Crack That Whip|
|Airs:||2008-05-25 at 08:30 pm|