Derek's mom tries to get him to live with her in Spain for six months.

Derek defends Edwin from a bully.

After Derek has trouble expressing his feelings for Sally, she recommends that he write a love song for her. Meanwhile, Edwin tries out his talent show comedy routine on George and Lizzie.

While the rest of the family heads off to Quebec for spring break, Casey and Derek decide to stay home to meet their previously planned engagements. However, the two discover that they now have to spend the entire vacation together when their original plans don't work out.

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A budding romance between Casey and Sam seems to have little chance of growing after Derek informs Sam of the “male code,” which prevents friends from dating their best friend's siblings. Elsewhere, Nora and George take a quiz to determine how well they know their kids.

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Even though Sally had one friendly dinner with her ex-boyfriend, an irritated Derek decides to spend time with Kendra to make a point that girls and guys can't be just friends. Casey attempts to counter Derek's argument by searching for a male student that she can be friends with. Meanwhile, Edwin fears that George's female co-worker who is coming over for dinner is out to steal his father away from Nora.

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Derek serves as a chaperone for Casey who is going to a party in Toronto with Truman. Meanwhile, Lizzie goes out on a date with a boy that the family has never met.

Fifteen-year-old Derek (Michael Seater) is unhappy about his dad's remarriage, mostly because it means he now has to deal with two stepsisters, the older of whom has her heart set on taking over Derek's bedroom. Casey: Ashley Leggat. Edwin: Daniel Magder. Lizzie: Jordan Todosey.

A budding romance between Casey and Sam seems to have little chance of growing after Derek informs Sam of the “male code,” which prevents friends from dating their best friend's siblings. Elsewhere, Nora and George take a quiz to determine how well they know their kids.

A worrisome Casey is having difficulty writing her valedictorian speech for graduation. Meanwhile, Edwin is concerned that he won't be able to live up to Derek's reputation at J.S. Thompson High when he goes there in the fall.

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As Aunt Fiona's wedding planner, Casey strives to make the ceremony and reception absolutely perfect and hitch-free, but things start to go wrong when Casey's cousin---and archrival---Vicky (Sarah Gadon) interferes. Meanwhile, Derek gets his first directing job: He's been asked to film the nuptial celebration. Fiona: Tara Manuel Rigal. Nora: Joy Tonner.

Derek makes Casey an offer she can't refuse. She agrees to run his highly profitable school-based business in exchange for a new cell phone and a more desirable locker location while he's at home recovering from chicken pox.

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To be eligible for college athletic scholarships, a "D" average Derek seeks George and Edwin's help in passing all of his final exams. Meanwhile, Nora and the girls try to get a stressed out Casey to stop over-studying and relax.

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Derek swaps test papers with Casey and then devises a plan to keep from getting caught.

Derek gives Edwin dating tips, but they don't seem to work for him.

After entering a tv dance contest, Casey must find a new dance partner when the previous one pairs up with her rival. Meanwhile, Lizzie dares George and Edwin to eat only healthy food for a week.

Casey meets resistance from her siblings and parents when she tries to create order amid the chaos that is their home life. Meanwhile, George needs help from the kids if he's going to pull off an important book club meeting that's taking place at their house while Nora is away on a retreat. Mr. Davis: James Codrington. Linda Davis: Catherine Burdon. Amy: Kayla Mills.

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