LwD 2x3 Middle Manic

Sam and Casey have been going through many make-up break-up phases, meanwhile Derek gets to go to a trip to Sweden if they win a sports game which Sam wins all the points, he only wants to go for the girls. Meanwhile Edwin and Lizzie team up to "observe," spy on teenage behaviour. Edwin finds out that every time Sam breaks up with Casey, Dereks team loses the game, but when they're together they win. So when Sam and Casey break up for good, Derek lies to Casey's best friend Emily, and they work together to help get Casey and Sam back together.

https://en.wikipedia.org/wiki/Life_with_Derek
Life with Derek is a Canadian teen sitcom that aired on Family Channel (English) and VRAK.TV (French) in Canada and on Disney Channel in the United States. The series stars Michael Seater and Ashley Leggat as the two oldest children in a stepfamily.

George Venturi (John Ralston), a divorced man from London, Ontario who had custody of his three children from a previous marriage: sons Derek (Michael Seater) and Edwin (Daniel Magder), and daughter Marti (Ariel Waller), marries a divorced woman named Nora McDonald (Joy Tanner), who has two daughters of her own from a previous marriage: Casey (Ashley Leggat) and Lizzie (Jordan Todosey). Up until that point, Casey was perfectly content with her life. Growing up as the oldest child in a household in Toronto with only her mother and sister had suited her well and brought her up as a self-sufficient and independent young woman.

After George and Nora's marriage, the McDonalds moved in with the Venturis in London, Ontario. Casey was originally upset about having to move to London, Ontario from Toronto, a much bigger city (as shown in the episode "How I Met Your Stepbrother"), for many reasons including Derek, but she eventually got over her own problems and agreed to move there for Nora and George's sake once she saw how much they cared for each other.