Emily dating kasey
Derek is opposed to a relationship between his best friend and his stepsister so he tries to sabotage the possibility of them coming together by informing Sam of the "Male Code", which says a guy's best friends cannot date their siblings (or step-siblings).Derek tries to break Casey and Sam up but fails to do so.Meanwhile Edwin and Lizzie team up to "observe," spy on teenage behaviour.
Soon, Derek connects the two incidents to Sam and accuses Casey of secretly crushing on him.She asks Derek for help on how to lie to her teacher to get an extension, but those lies tangle up so far, that the teacher ends up sitting on her couch in her house. When Casey gets attracted to Scott, Lizzie's soccer coach , he asks her out. Derek feels guilty after hearing from Scott that he's dating other soccer sisters.Meanwhile, George is upset after Nora says that she did not feel love at first sight with George.until they find out that they're missing a good lead singer when Derek and the band practice in front of the family and end up getting bad feedback.When Casey realizes that she had written down the wrong due in date for her science project one day before it was due in.