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.

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.

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.

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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Casey is enraged to learn that she has been labeled a “grade grubber” by her fellow classmates. To rid herself of this unflattering rep, she decides to team up on a school project with the biggest slacker she knows: Derek. Michael Seater. Marti: Ariel Waller. George: John Ralston. Nora: Joy Tonner.

Casey gets more than she bargained for when she attempts to add a feminine touch to the living room and, in the process, starts a decorating feud between her parents. Derek: Michael Seater. Edwin: Daniel Magder. Nora: Joy Tonner. George: John Ralston. Casey: Ashley Leggat.

Casey engages in a high-stakes game of chance against the master of cheating siblings, Derek; and George finds himself in hot water for mentioning his ex's name during a heated argument with Nora.

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Casey wonders whether Derek has an ulterior motive when he asks her best friend Emily (Shadia Simmons) out on a date.

Derek is forced to spend time with Lizzie, teaching her hockey; Casey offers Edwin romance tips.

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Casey decides to get rid of her goody-goody image in an attempt to get Trevor to go out with her---and win a bet with Derek.

A popular girl named Kendra (Lauren Collins) has an ulterior motive---involving Derek---when she chooses Casey as her partner for an English project.

Casey goes against her mother's wishes when she invites her birth father to the house for dinner on what turns out to be an evening filled with surprises---most of them bad.