Vacation with Derek is a 2010 Canadian television movie based on the TV series Life with Derek. The TV movie follows the McDonald-Venturi family as the children are forced to spend part of their summer vacation with their grandmother at her lodge. It was announced on Family Channel and French-Canadian channel VRAK.TV in March 2010 that the movie would premiere on June 25, 2010 in Canada, while December 12, 2010 was listed as the premiere date in the trailer for the United States, but the movie never actually aired in the U.S. when it was supposed to; the movie finally premiered in the United States on Starz Kids & Family on March 6, 2011. A commercial on Nickelodeon Australia stated that it would premiere on June 19, 2010. A commercial on TG4 stated the Irish premiere would be on the channel Thursday October 28, 2010 at 5:10p.m., part of the channel's Mid-Term Halloween movie week.

Plot

Casey and Derek are back but nothing has changed, they are still at each other's throats, and still have "sibling" rivalry. The only good thing about it all is that it's summer vacation, and everyone is planning on going on a trip to Casey and Lizzie's grandmother's lakefront lodge for the summer. But their plans get a little messed up when Derek is forced into going by his dad. Things get even more messed up when Casey has to ride with Derek to the Blue Heron Lodge. On their way up there they get pulled over by the cops, meanwhile Edwin, Lizzie, Marti, Nora and George have already arrived. They soon find out that when Nora's mom said she wanted her grandchildren to visit, she meant her blood grandchildren, but agrees to let them stay, while George and Nora head for Montreal. Soon Derek and Casey get to the lodge but get stopped by Edwin who informs them about what's happened. After this, Derek says he wants to leave, Casey takes his keys, and he starts running after her. That's when Derek meets Felicia. One thing leads to another and Derek starts dating the competing lodge's daughter, then he soon realizes that it wasn't the best thing to be doing, and he breaks up with her. Meanwhile, Casey meets Jesse, a waiter at the lodge dining area, and they both love to dance and start dancing. Meanwhile, Edwin gets hurt, Lizzie meets a guy, and Marti finds a lizard. Soon one thing leads to another and they end up trying to save the lodge and they succeed. At the end they have a dance party, and it shows the ending credits then shows it a year later when the first McDonald-Venturi is born. They named him Simon, and everything is well, and everyone lives happily ever after.