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The following is a list of episodes of the Canadian, which also appeared on Disney Channel, sitcom Life with Derek. The show premiered on September 18, 2005 and ended its run on March 25, 2009, spanning 4 seasons, with 70 episodes produced.

Series overview

Season Episodes Season premiere Season finale
1 13 September 18, 2005 (2005-09-18) January 22, 2006 (2006-01-22)
2 13 July 1, 2006 (2006-07-01) December 15, 2006 (2006-12-15)
3 26 May 11, 2007 (2007-05-11) July 5, 2008 (2008-07-05)
4 18 July 19, 2008 (2008-07-19) March 25, 2009 (2009-03-25)

Episode list

Season 1 (2005/06)

No. in
series
No. in
season
Title Original air date Prod. code
1 1 "The Room" September 18, 2005 (2005-09-18) 101
Casey finds her room in the new house too small to live in so she asks the parents to have Derek's room. It turns out in a battle between the two "step" siblings to determine who will have Derek's room.
2 2 "The Fall" September 25, 2005 (2005-09-25) 103
Casey trips at school on the staircase (and takes it out on innocent bystanders) after Derek insults her. Derek can't stop laughing as he and his best friend, Sam, look on. Derek nicknames her "Klutzilla", a name that quickly spreads throughout the school. The whole school is "watching out" for Klutzilla and she blames it all on Derek. A second incident happens when Derek insults her again and she falls into Marti's box in front of Sam. Soon, Derek connects the two incidents to Sam and accuses Casey of secretly crushing on him.
3 3 "The Party" October 2, 2005 (2005-10-02) 104
Casey and Derek must persuade their parents they can be left alone for the weekend. Casey intends to have a quiet weekend at home and watch some movies with Emily, but as always Derek has conflicting plans and has a party and damages the house.
4 4 "Puppy Dog Tails" October 16, 2005 (2005-10-16) 107
Living-room redecorating creates strife within the family, as Casey, Lizzie, and Nora want to add a feminine touch to the household, while Derek, Edwin, Marti, and George are perfectly fine with the way the household is.
5 5 "Grade-Point: Average" October 23, 2005 (2005-10-23) 109
Casey discovers she has a reputation as a grade-grubber and wants to rid herself of it by choosing a slacker to work with on a group assignment – like Derek. Derek is on the brink of failing English and wants to pick someone smart to work with on the same group assignment – like Casey.
6 6 "The Wedding" October 30, 2005 (2005-10-30) 111
Casey and Derek volunteer to organize Casey's aunt's wedding reception, but Casey's cousin, Vicki, is threatening to blow the entire thing apart because her mom didn't even ask her how she felt about the marriage.
7 7 "The Poxfather" November 6, 2005 (2005-11-06) 112
Derek is quarantined at home as he is with the chicken pox, and is hiding a secret which Casey intends to find out. George has to prevent himself from getting the chicken pox Derek has, as he has a job presentation.
8 8 "House of Games" November 13, 2005 (2005-11-13) 102
The McDonalds and the Venturis kids (Casey and Lizzie vs Derek, Edwin, Marti) decide that the best places in the house aren't big enough for the two families, so they agree to decide by games of chance (dice, cards, etc).
9 9 "Marti The Monster" December 4, 2005 (2005-12-04) 106
Marti sabotages Derek when he babysits her in an attempt to impress a girl.
10 10 "Sweet Misery" December 11, 2005 (2005-12-11) 108
When Casey sprains her ankle because of Derek, she gets whatever she wants(including the chair that Derek always sits in, and his tickets to a White Stripes concert) and Lizzie does everything for her, making Derek jealous. He then fakes an injury, making Casey do everything for him, and when Marti cuts up the tickets to make a picture, Derek accidentally reveals that he was faking the injury by running up the stairs, and Casey does the same thing. Then, Lizzie and Edwin get whatever they want.
11 11 "Babe Raider" December 18, 2005 (2005-12-18) 110
Casey notices Derek, Sam and Edwin playing a sexist video game (Babe Raider) and immediately launches a campaign against the sexist attitudes in the house.
12 12 "All Systems No Go" January 15, 2006 (2006-01-15) 105
Chaos strikes the household. Derek dyes the white clothes pink, uses the neighbor's pool and stomps on their flowers, Marti makes "potions" with Casey's perfume and shampoo and hits the neighbor's son. Nora schedules a book club at the house, which she forgets to tell George about, and the family tries some last minute cleaning to look organized.
13 13 "Male Code Blue" January 22, 2006 (2006-01-22) 113
Casey likes Derek's best friend, Sam, who has feelings for Casey too. Derek is opposed to a relationship between his best friend and his stepsister so he tries to sabotage the possibility of them coming together by informing Sam of the "Male Code", which says a guy's best friends cannot date their friends siblings (or step-siblings). Derek tries to break Casey and Sam apart but fails to do so.

Season 2 (2006)

  • Starting with this season, the series was taped in Toronto, Ontario.
No. in
series
No. in
season
Title Original air date Prod. code
14 1 "Date with Derek" July 1, 2006 (2006-07-01) 201
When Derek asks Casey's best friend, Emily, out for a date, Casey has to wonder: Is he really interested in Emily, or is this some kind of revenge for "stealing" Sam?
15 2 "He Shoots, She Scores" July 29, 2006 (2006-07-29) 203
Derek and Casey have a competition with who is the best sister or brother. However Lizzie has a problem playing hockey and Derek is the only one who could be her trainer and seeing as Derek is always with Lizzie, Edwin asks Casey for help about girls. What could possibly go wrong?
16 3 "Middle Manic" September 22, 2006 (2006-09-22) 202
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.
17 4 "The Venturian Candidate" September 29, 2006 (2006-09-29) 204
Casey has some great ideas to improve the school so she decides to run for school president. But, when Emily advises her to keep in mind the risk of destroying her reputation, Casey decides to enlist Derek to run for her, since he is popular.
18 5 "Battle of the Bands" October 6, 2006 (2006-10-06) 206
Derek and Sam are stoked for their upcoming performance in the Clash of the Bands contest at school and with them thinking Sheldon as easy competition, they can't lose... until they find out that they're missing a good lead singer when Derek and the band practice in front of the family and end up getting bad feedback.
19 6 "Lies My Brother Told Me" October 13, 2006 (2006-10-13) 205
When Casey realizes that she had written down the wrong due in date for her science project one day before it was due in. She asks Derek for help on how to lie to her teacher to get an extension, but those lies tangle up so far, that the teacher ends up sitting on her couch in her house. Will everything go right?
20 7 "Crushin' the Coach" October 20, 2006 (2006-10-20) 210
When Casey gets attracted to Scott, Lizzie's soccer coach , he asks her out. But Lizzie too, is attracted to Scott. Derek feels guilty after hearing from Scott that he's dating other soccer sisters. Meanwhile, George is upset after Nora says that she did not feel love at first sight with George.
21 8 "Prank Wars" October 27, 2006 (2006-10-27) 207
To pay Derek back for his many practical jokes, Casey pulls a huge prank of her own: stealing the office furniture from the new uptight Principal. Everyone thinks Derek did it with the new principal.
22 9 "Freaked Out Friday" November 3, 2006 (2006-11-03) 208
While Casey is freaking out about her upcoming dance competition, (by being even more dramatic and needy) Derek is freaking out about his upcoming hockey playoff game.
23 10 "The Bet" November 9, 2006 (2006-11-09) 211
Derek keeps making bets with people and when Casey wants to join in, she bets that she can get a punk guy, Trevor, from school to ask her out. George and Nora worry about Casey's new look because it scares their family. Meanwhile, Edwin bets Lizzie that someone will call him cool.
24 11 "Mice and Men" December 1, 2006 (2006-12-01) 212
When Derek starts to have a crush on a girl named Kendra (Casey's new study partner), Casey tricks him into changing his laid-back image into a more mature person because he wiped out Casey's report on the computer. While George, Edwin, and Derek are afraid of the mice living in their house they try to kill them, but Lizzie won't allow it and makes the mice her new pets.
25 12 "Dinner Guest" December 8, 2006 (2006-12-08) 209
Casey tries to get rid of Derek for the dinner party she has planned with her biological father. But to Casey's surprise, Derek and the rest of the Venturis get along great with her father.
26 13 "The Dating Game" December 15, 2006 (2006-12-15) 213
Kendra volunteers to help Casey get a boyfriend by throwing a small get together at the Venturi-McDonald home. Derek uses the opportunity to throw a huge house party.

Season 3 (2007/08)

No. in
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No. in
season
Title Directed by Written by Original air date Prod. code
27 1 "Two Timing Derek" May 11, 2007 (2007-05-11) 301
When Derek already has a girlfriend, Casey is shocked when he asks out a friend of hers, Lucy. Casey asks Emily to dig up information on whether Max is available or not. Meanwhile, Nora has set up a dinner with another family, but some members of her family object.
28 2 "It's Our Party" May 18, 2007 (2007-05-18) 302
George and Nora plan a joint party for Lizzie and Edwin's 'birthday'; Nora and George were partied from their wedding for Lizzie's birthday and Edwin's birthday was three months away. Lizzie wants everyone to accept her and guy friend Jamie as just friends. Casey has a date with Max after his football game, and foolishly goes to Derek for information about football.
29 3 "Misadventures in Babysitting" May 31, 2007 (2007-05-31) 304
Derek and Casey turn out to be the world's worst babysitters, so Edwin invites his friend, troublemaker, Teddy (Cameron Ansell) over to stir up some trouble, such as tying Derek to his chair, tickling his feet, and forcing him to eat broccoli. Casey sees Max (Robbie Amell), with his ex-girlfriend Amy and assumes they are getting back together.
30 4 "Slacker Mom" June 23, 2007 (2007-06-23) 305
Casey's Mom Nora decides to quit her job for a while to spend more time with her family who she assumes she's been neglecting. Derek is happy because he treats Nora with little respect, like a maid. But when she turns up at their school wanting to host the school funfair, things get a little out of hand for Casey, because she has recently gotten a cool status from her boyfriend, and her mom is risking it.
31 5 "Power Failure" July 7, 2007 (2007-07-07) 307
Casey is shocked when Derek is selected to be a prefect at school and sets out to prove he's not the man for the job; Edwin and Lizzie are jealous that Marti always gets her way.
32 6 "Don't Take a Tip From Me" July 21, 2007 (2007-07-21) 310
Casey and Derek both land jobs at the same restaurant, and things don't go quite as Casey expected when Derek is a great waiter and she is a terrible waitress.
33 7 "The Bully Brothers" July 28, 2007 (2007-07-28) 306
When Edwin gets picked on by a bully, he goes to Derek for advice, inadvertently causing Derek big trouble of his own, by Edwin's bully's older brother, who had bullied Derek when they were young.
34 8 "Home Movies" August 5, 2007 (2007-08-05) 315
Casey gets picked to make a movie about whatever she wants it to be and she chooses her family as her topic, but she only wants to capture those sweet and memorable times she has with her family not the daily Derek Pranks and her family being who they are everyday. She writes a script so her family can go along with but everyone ends up getting frustrated and annoyed. What if she can't get her movie finished in time? Will a certain someone have to help?
35 9 "Show-Off-Tune" August 11, 2007 (2007-08-11) 322
Casey being very musical signed up for a musical but she also realizes that Derek is in the chorus by himself... for the girls. She also has to work with a boy named Noel, since he is the main male role of the play, but she found out that he only did the play because of a bet, thus she gets angry. She also finds out that her boyfriend doesn't want to watch her perform! Could this be the end of Casey and Max? Will Noel make a move?
36 10 "Summer School Blues" August 26, 2007 (2007-08-26) 314
Derek is forced to attend summer school but sneaks out and injects some fun into Casey's dull camp curriculum; Edwin and Lizzie set up a lucrative pet-sitting business.
37 11 "Grade a Cheater" September 11, 2007 (2007-09-11) 316
Derek switches test papers with Casey, and then lures her into a scheme that will keep them both out of trouble; Edwin, Lizzie, and Marti feel that they are doing too many chores for the amount of allowance they are getting.
38 12 "Adios Derek" September 25, 2007 (2007-09-25) 308
George and Abby (Derek's, Edwin's, and Marti's real mom) are dismayed Derek is failing Spanish and decide he should live with Abby in Spain for six months. We learn that Derek failed both nap-time and recess when he was younger in this episode.
39 13 "Fright Night" October 15, 2007 (2007-10-15) 311
Casey lectures Derek and Edwin for watching scary movies – of which she finds silly and fake – then changes her opinion when she gets scared herself.
40 14 "Sixteen Sparkplugs" November 5, 2007 (2007-11-05) 309
The family stages an intervention to convince George to buy a new car; Derek faces the scary possibility of spending his 16th birthday at home with his family.
41 15 "When Derek Met Sally" November 26, 2007 (2007-11-26) 312
Derek swears off girls until he meets Sally (Kate Todd), the attractive new waitress at Smelly Nellie's. Lizzie is freaked out when her best friend Jamie tells her he likes her.
42 16 "A Very Derekus Christmas" December 3, 2007 (2007-12-03) 326
When Christmas plans go awry, Aunt Madge encourages Derek to help restore the family's holiday spirit.
43 17 "Ivanwho?" January 7, 2008 (2008-01-07) 317
After being pranked by Derek, Casey wishes Max could be chivalrous like the literary hero Ivanhoe.
44 18 "Rumor Mill" February 11, 2008 (2008-02-11) 303
After Derek breaks up with Kendra (due to the fact he has to buy her a Valentine's Day gift), Kendra asks Casey's boyfriend Max to the Valentine's Day dance. George forgets to plan for his first Valentine's Day with Nora.
45 19 "Derek Un-Done" March 3, 2008 (2008-03-03) 318
When Derek thinks Sally is making signals to him that she is interested he acts like he is not interested to her anymore. Finally she doesn't since Derek escuses for playing her like that and Casey thinks Max is going to break up with her after her dinner plans with Max and her family go horribly wrong.
46 20 "Not So Sweet 16" April 7, 2008 (2008-04-07) 319
Casey's 16th birthday is coming up, and she is planning a sophisticated dinner with her friends, but Derek has other ideas and all plans go horribly wrong with an unexpected trip to hospital.
47 21 "Driving Lessons" April 19, 2008 (2008-04-19) 320
Casey is thrilled to get her driver's license before Derek, until she gets stuck playing chauffeur to her younger siblings. Derek fails his driving test for the 5th time. George crashes into a policeman's parked car. They find out George hasn't paid a lot of his tickets so he gets his license suspended. Casey then teaches Derek and George how to drive.
48 22 "Make No Prom-ises" May 19, 2008 (2008-05-19) 313
Casey's dream of a romantic prom night turns into a nightmare when Derek accidentally ruins her dress.
49 23 "Cheerleader Casey" June 2, 2008 (2008-06-02) 321
Casey tries out for the cheerleading squad much to Max's dismay and to the fact that Max's jealous ex-girlfriend is the head cheerleader.
50 24 "Allergy Season" June 16, 2008 (2008-06-16) 323
Casey develops mysterious allergies after Max gives her his football jacket. George gets fed up with Derek's jokes and makes a deal with Derek that if he can be nice for one week, he won't have to pay for the insults he said. After the homecoming game, Casey breaks up with Max.
51 25 "Things That Go Bump in the Night" June 29, 2008 (2008-06-29) 324
Grounded for the weekend for fighting again, Casey and Derek try to sneak out to go to a party, but they end up putting a dent on George's car.
52 26 "Derek's School of Dating" July 5, 2008 (2008-07-05) 325
Derek tells Edwin to follow his advice which is to play it cool as he is doing to Sally.

Season 4 (2008/09)

No. in
series
No. in
season
Title Original air date Prod. code
53 1 "Two Kisses, One Party" July 19, 2008 (2008-07-19) 401
Sally asks Derek to help out at Marti's birthday party, but he does not want to do it. Casey tells Max she wants to get back together. Edwin also helps with the Party-Planning.
54 2 "Open Mic Plight" July 27, 2008 (2008-07-27) 402
Sally suggests that Derek write her a song for the mini talent show at Smelly Nelly's, since he has trouble expressing his feelings for her; Edwin puts together a comedy routine for the talent jig, but he's hurt when Lizzie and George say it isn't funny.
55 3 "Just Friends" August 12, 2008 (2008-08-12) 403
Derek becomes jealous when Sally and her ex-boyfriend Patrick start spending more time together. Derek claims that people of the opposite gender cannot be friends with each other. Edwin is suspicious that George and a close friend of his are having an extramarital affair. Noel Covington (Adam Butcher) returns in this episode.
56 4 "March Break" August 26, 2008 (2008-08-26) 404
George decides to take the family on a road trip to Quebec City, but Derek and Casey decide to stay home. When their plans for the week are ruined, things start getting chaotic.
57 5 "6½" September 12, 2008 (2008-09-12) 406
Casey is crushed when a new kid named Truman French (Joe Dinicol) at school starts rating girls and only gives her a 6½ out of 10.
58 6 "Derek Denies Denial" September 23, 2008 (2008-09-23) 407
Derek breaks up with Sally after she announces her plans to attend an out-of-province university in the fall. Derek claims he's fine with the breakup, but Casey and Edwin don't believe him.
59 7 "Happy New Schoolyear" October 7, 2008 (2008-10-07) 411
After an offhand comment from Casey, Derek decides to drop out of 12th grade and follow Sally to Vancouver. As the new school year begins, Lizzie decides to change her looks, while Casey changes her room. Meanwhile, Marti is hiding in her tent and Edwin is upset about being broken up with Michelle.
60 8 "No Secrets" October 21, 2008 (2008-10-21) 408
Edwin is having an issue with snooping, which is of course encouraged by Derek. Casey has reoccurring dreams about Truman. One night, after Casey has another dream about Truman, she discovers that her dream diary is missing. She uses her prior knowledge of Derek and Edwin's snooping problems to assume that they did it. Casey confronts Truman in school and begs him to stop annoying her.
61 9 "Take a Stepkid to Work Day" November 4, 2008 (2008-11-04) 405
Casey spends the day with George at his law office and takes the initiative to reorganize his filing system, with disastrous results. Derek tries to help Nora land a business deal with a wealthy client.
62 10 "No More Games" November 18, 2008 (2008-11-18) 414
Edwin gets sick of Derek's way of either beating him at games or cheating him at games so he decides to stop playing with Derek. Casey takes a fencing class and is stuck with Truman as her partner and refuses to show any interest in him when she makes a pact not to date anyone for the rest of the year.
63 11 "How I Met Your Stepbrother" December 2, 2008 (2008-12-02) 410
On her second wedding anniversary, Nora asks Casey and Derek to tell the story of how they met and their plot to destroy their parents' engagement to their other siblings.
64 12 "Casey & Ralph?!" December 16, 2008 (2008-12-16) 412
Ralph stays at Derek's house while his parents are away for the weekend. While there, he develops a crush on Casey.
65 13 "Tuesday Afternoon Fever" December 30, 2008 (2008-12-30) 413
Casey enters a TV dance contest in order to pursue her life-long dream of dancing. Derek enters to mock Casey but is praised for his style and the two of them make it to the finals. When Derek's partner, Sadia Sullivan (Romina D'Ugo) finds out he doesn't know how to dance she takes Casey's partner which devastates Casey. The rest of the family give Derek the silent treatment for hurting Casey and ruining her dream. Derek finally resorts to being Casey's partner. Also, Lizzie dares junk food addicts George and Edwin to eat only healthy food for a week and to exercise regularly, otherwise they'll get their hair dyed purple.
66 14 "Teddy's Back" March 4, 2009 (2009-03-04) 415
Teddy comes back and refuses to leave. He gets on everyone's nerves but no one knows how to get rid of him. He begins to do everything that Derek tells him to do and Derek starts to like it but it makes Lizzie and Edwin suspicious of his intentions. Truman decides to make his and Casey's first date a really bad date because Casey wanted it to be memorable. He feels bad afterward so he lets Casey plan the perfect date, so Casey decides to pay him back by giving him a horrible date.
67 15 "Rude Awakenings" March 11, 2009 (2009-03-11) 409
When midterms and report cards are around the corner, Casey is worried about her future, and Derek is slacking off. When Nora and Lizzie realize that Casey is stressed out, they try to relax her. At the same time, Derek tries to raise his grades so he won't fail. Neither of the family's attempts to destress Casey, or to improve Derek's grades are working, so Casey and Derek come up with a plan to get good grades.
68 16 "Truman's Last Chance" March 18, 2009 (2009-03-18) 416
Casey forces Truman to invite her to a party that he was invited to in Toronto. Nora is concerned with her daughters' boyfriends and wonder if they are right for them. Edwin goes with Lizzie on her date with Marven and Derek goes to the party with Truman, Casey, and Viki as their chaperones.
69 17 "Surprise" March 25, 2009 (2009-03-25) 417
The prom is coming up and Casey and Emily are dateless. Truman wants to take Casey, but she won't speak to him due to an incident during the last episode. Derek wants to take Emily but she's already made plans with Casey to go to the prom together. Meanwhile, Nora and George reveal that they are going to have a baby.
70 18 "Futuritis" March 25, 2009 (2009-03-25) 418
As graduation day approaches, a worried Casey is having difficulty writing her valedictorian speech, which she blames on her fear of Derek pulling a prank and ruining it until Derek points out that she's actually afraid of what the future holds. 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. The family celebrates Casey and Derek's high school graduation and the two make a very awkward announcement: that they are going to the same university.

Note: This is the series finale.

Film

Title Directed by Written by Original air date
{{{EpisodeNumber}}} "{{{Title}}}" June 25, 2010 (2010-06-25)
Casey and Derek are back and continue their sibling rivalry during a family vacation to visit their grandmother, Felicia at her beautiful lakefront lodge. Things heat up with Casey when she meets Jesse, a young dancer who happens to be a waiter at the lodge. Meanwhile, as Derek is "chilling" on his vacation, he falls for Roxy, the rich girl who lives across the lake. But when Roxy’s father, a greedy land developer, threatens to destroy the natural beauty around them, the McDonald-Venturi kids bond together to save the lake and the lodge, with a little legal help from George and Nora who are having a baby too.

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