History Series / LifeWithDerek

** In addition, in "Mice and Men", Emily calls Kendra, "a popular girl who is in the grade ahead of us", while in the fourth season, during Casey and Derek's senior year, Kendra is still in high school. Though it is possible she was held back a grade, and this is simply not mentioned, as Kendra did tell them that her parents "want her to do well for a change".

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year and part of the summer after. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the flashbacks show that Casey and Derek were already in high school at the time, may be consistent. However, the episode after that, "Happy New School Year", suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, not counting the flashbacks of "How I Met Your Stepbrother". The film ''Vacation with Derek'' confuses this, however, as it takes place at the end of the summer before Casey and Derek go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy in the penultimate episode, only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing. The spinoff film ''Life with Luca'' adds to the confusion, as George and Nora's twentieth wedding anniversary is one of the plot points, and Simon is stated to be in college. Simon is first shown to be born in the epilogue at the end of the first movie, which takes place one year after the rest of it, so he shouldn't even be one year old yet. If George and Nora have been married for twenty years in the spinoff, then depending on whether only four or five years passed by the time of the first film's epilogue, he should be fifteen or sixteen during the film, which isn't normally old enough to be in college (except in rare circumstances). The spinoff film also has both Derek and Lassiter state that the latter was principal of the high school for all four years Derek attended, when the series introduces him as the new principal during season 2, when Derek is a sophomore.

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year and part of the summer after. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the flashbacks show that Casey and Derek were already in high school at the time, may be consistent. However, the episode after that, "Happy New School Year" suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, not counting the flashbacks of "How I Met Your Stepbrother". The film ''Vacation with Derek'' confuses this, however, as it takes place at the end of the summer before Casey and Derek go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy in the penultimate episode, only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing. The spinoff film ''Life with Luca'' adds to the confusion, as George and Nora's twentieth wedding anniversary is one of the plot points, and Simon is stated to be in college. Simon is first shown to be born in the epilogue at the end of the first movie, which takes place one year after the rest of it, so he shouldn't even be one year old yet. If George and Nora have been married for twenty years in the spinoff, then depending on whether only four or five years passed by the time of the first film's epilogue, he should be fifteen or sixteen during the film, which isn't normally old enough to be in college (except in rare circumstances). The spinoff film also has both Derek and Lassiter state that the latter was principal of the high school for all four years Derek attended, when the series introduces him as the new principal during season 2, when Derek is a sophomore.

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year and part of the summer after. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the flashbacks show and Casey and Derek were already in high school at the time, may be consistent. However, the episode after that, "Happy New School Year" suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, not counting the flashbacks of "How I Met Your Stepbrother". The film ''Vacation with Derek'' confuses this, however, as it takes place at the end of the summer before Casey and Derek go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy in the penultimate episode, only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing. The spinoff film ''Life with Luca'' adds to the confusion, as George and Nora's twentieth wedding anniversary is one of the plot points, and Simon is stated to be in college. Simon is first shown to be born in the epilogue at the end of the first movie, which takes place one year after the rest of it, so he shouldn't even be one year old yet. If George and Nora have been married for twenty years in the spinoff, then depending on whether only four or five years passed by the time of the first film's epilogue, he should be fifteen or sixteen during the film, which isn't normally old enough to be in college (except in rare circumstances). The spinoff film also has both Derek and Lassiter state that the latter was principal of the high school for all four years Derek attended, when the series introduces him as the new principal during season 2, when Derek is a sophomore.

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year and part of the summer after. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the flashbacks show and Casey and Derek are already in high school, may be consistent. However, the episode after that, "Happy New School Year" suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, not counting the flashbacks of "How I Met Your Stepbrother". The film ''Vacation with Derek'' confuses this, however, as it takes place at the end of the summer before Casey and Derek go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy in the penultimate episode, only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing. The spinoff film ''Life with Luca'' adds to the confusion, as George and Nora's twentieth wedding anniversary is one of the plot points, and Simon is stated to be in college. Simon is first shown to be born in the epilogue at the end of the first movie, which takes place one year after the rest of it, so he shouldn't even be one year old yet. If George and Nora have been married for twenty years in the spinoff, then depending on whether only four or five years passed by the time of the first film's epilogue, he should be fifteen or sixteen during the film, which isn't normally old enough to be in college (except in rare circumstances). The spinoff film also has both Derek and Lassiter state that the latter was principal of the high school for all four years Derek attended, when the series introduces him as the new principal during season 2, when Derek is a sophomore.

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year and part of the summer after. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the school year had already started, may be consistent. However, the episode after that, "Happy New School Year" suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, assuming the discrepancy with George and Nora's wedding is forgotten. The film confuses this further, as it supposedly takes place at the end of the summer before they go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing. The spinoff film ''Life with Luca'' adds to the confusion, as George and Nora's twentieth wedding anniversary is one of the plot points, and Simon is stated to be in college. Simon is first shown to be born in the epilogue at the end of the first movie, which takes place one year after the rest of it, so he shouldn't even be one year old yet. If George and Nora have been married for twenty years in the spinoff, then depending on whether only four or five years passed by the time of the first film's epilogue, he should be fifteen or sixteen during the film, which isn't normally old enough to be in college (except in rare circumstances). The spinoff film also has both Derek and Lassiter state that the latter was principal of the high school for all four years Derek attended, when the series introduces him as the new principal during season 2.

* CanadaEh: Generally averted, but not altogether avoidable in a self-consciously Canadian show. At one time, averted and mocked in one episode. And the accents. ''Dear Lord'', the accents.

* WhyDidItHaveToBeSnakes: Literally snakes, in this case. Derek's phobic of them, as shown in the movie. He's also afraid of mice.

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year and part of the summer after. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the school year had already started, may be consistent. However, the episode after that, "Happy New School Year" suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, assuming the discrepancy with George and Nora's wedding is forgotten. The film confuses this further, as it supposedly takes place at the end of the summer before they go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing. The spinoff film ''Life with Luca'' adds to the confusion, as George and Nora's twentieth wedding anniversary is one of the plot points, and Simon is stated to be in college. Simon is first shown to be born in the epilogue at the end of the first movie, which takes place one year after the rest of it, so he shouldn't even be one year old yet. If George and Nora have been married for twenty years in the spinoff, then depending on whether only four or five years passed by the time of the first film's epilogue, he should be fifteen or sixteen during the film, which isn't normally old enough to be in college (except in rare circumstances).

* WritersCannotDoMath: Assuming the chronological order of the episodes is the production order, the first two seasons, up until the third season episode "Summer School Blues", cover one school year. The next episode "Home Movies", up until the season 4 episode "Rude Awakenings" cover another. The next episode, "How I Met Your Stepbrother", is stated to take place on George and Nora's second wedding anniversary, which, given that they married shortly before the events of the first episode and the school year had already started, may be consistent. However, the episode after that, "Happy New School Year" suggests that it was still summer during that episode, as it focuses on school restarting. The rest of the season takes place during the next school year, as it ends with Casey and Derek graduating from high school. Overall, it appears that three years have passed in-universe over the course of the show, assuming the discrepancy with George and Nora's wedding is forgotten. The film confuses this further, as it supposedly takes place at the end of the summer before they go to university, suggesting it's only been a few months since the series ended. However, Nora is already heavily pregnant with Simon, despite having realized her pregnancy only shortly before the prom, so she shouldn't be that far along a few months later. On top of this, it is also stated in the film that George and Nora have been married for four years by now (the length of the show airing), despite the earlier point about only three passing.

* WhyDidItHaveToBeSnakes: Literally snakes, in this case. Derek's phobic of them. He's also afraid of mice.

The show focused on [[BlendedFamilyDrama two families merging together after divorces]]. In typical NuclearFamily fashion, the siblings don't get along all the time, and HilarityEnsues. The main character is Casey, a [[ThePerfectionist perfectionistic]], [[ControlFreak overly controlling]] teenage girl who has a rivalry with the titular Derek, her main antagonist, a [[TallDarkAndSnarky sarcastic]], [[{{Jerkass}} prankster jerk]].

''Life with Derek'' is a [[CanadianSeries Canadian]] [[LiveActionTV live-action]] [[DomCom domestic comedy]], produced for Canada's Creator/FamilyChannel, which gained a respectable American audience airing on Creator/DisneyChannel.

The show focused upon [[BlendedFamilyDrama two families merging together after divorces]]. In typical NuclearFamily fashion, the siblings don't get along all the time and HilarityEnsues. The main character is Casey, a [[ThePerfectionist perfectionistic]], [[ControlFreak overly controlling]], teenage girl who has a rivalry with the titular Derek, her main antagonist, a [[TallDarkAndSnarky sarcastic]], [[{{Jerkass}} prankster jerk]]. The show ran for two short thirteen-episode seasons (2005-06 and 2006-07) and two full seasons (2007-08 and 2008-09).

TheMovie, ''Vacation with Derek'', premiered in Canada on June 25, 2010 and in the U.S. on May 14th, 2011.

In late 2012 there was scheduled to be an official relaunch with the working title "Life With Derek, Again" involving the original cast members in pre-production. [[WhatCouldHaveBeen It was not picked up for production.]]

In 2022, a sequel movie, "Life With Luca", was ordered and produced, and premiered on February 20, 2023.

Compare ''Series/EvenStevens'', a similar Disney Channel show often considered this one's predecessor.

%%* ExpositoryThemeTune

%%* SweaterGirl: Casey, and [[LampshadeHanging lampshaded in the opening sequence.]]

%%* TriangRelations

In 2022, a sequel movie, "Life With Luca", was ordered and produced, and is set to premiere in early 2023.

Compare ''Series/EvenStevens''.

* BigManOnCampus: Max. Derek tries.

* ButtMonkey: Edwin

* {{Cloudcuckoolander}}: Ralph
* ColdOpening

-->'''Casey''': So you're saying Vicky's insecure?\\

-->'''Paul''': Don't you think you expectations are just a little too high?\\

* DefrostingIceQueen: Grandma Felicia in TheMovie.

* LovableJock: Sam and Ralph.

* NotBloodSiblings: Often an excuse of the shippers.
* NuclearFamily

* OfficialCouple: The roster is as follows:
** Casey and:
*** [[TheMasochismTango Sam]]
*** [[AllGuysWantCheerleaders Max]]
*** [[BelligerentSexualTension Truman]]
** Derek and:
*** Kendra
*** Sally
*** [[spoiler: Emily]]
* OnlySaneMan: Nora and Lizzie.

* SchoolPlay: A musical about pirates.

* SweaterGirl: Casey, and [[LampshadeHanging lampshaded in the opening sequence.]]

* TeamMom: Casey

* ThoseTwoGuys: Sam and Ralph, depending on the episode.

* UnsympatheticComedyProtagonist: Derek mostly, although Casey ventures into this territory quite a lot.
* UptightLovesWild: Unintentional, but if it wasn't...

* HollywoodNerd: ''Casey. Oh, my Lord, yes, Casey''.

* LoadsAndLoadsOfCharacters: Seems to be a Canadian thing.
* LocalHangout: Smelly Nelly’s