In their struggle to find their place, both at home and at school, Casey learns to "loosen up" and break a rule or two, while Derek learns to occasionally "walk the straight and narrow" and put family interests ahead of his own gain, even if it means that Casey benefits.
Sometimes, this resolution comes only after Lizzie and Edwin negotiate as (sometimes unauthorized) agents for their respective biological siblings to overcome some impasse or communications breakdown between Casey and Derek.
They are persistent, no matter who gets in the way, whether it's friends or family.
However in May of 2007, Naturally, Sadie was pulled off of the air, but Life with Derek was left on.
In India, Disney Channel India premiered the show along with Wizards of Waverly Place as a part of the May-hem summer special.
She often tries to help Casey become more popular at school, helps her fit in and helps her figure out the mystery boys along the way.
According to Casey, she has a "lighthearted way of dealing with (Casey's) many problems".
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