Spike, Caitlin, Joey, Lucy, and Snake have a high school reunion at Degrassi Community School. Joey's wife has died and he is unsure if he wants to go to the reunion, especially after meeting Caitlin's fiancé. Meanwhile, as Emma (Spike's daughter) is preparing to enter grade 7, she meets a boy online named Jordan.

While the high school reunion is underway at Degrassi, Emma meets her online friend, Jordan, in person, and no one's evening goes as planned.

Spike and Snake are finally getting married! Emma is thrilled to be her mother's little helper for everything wedding related but it seems like all their plans start going wrong as the date draws nearer. As if stress about the ceremony wasn't enough, Spike finds out she's pregnant and struggles with whether or not to tell Snake.

Emma takes matters into her own hands and tells Snake about the baby. Snake and Spike have a long talk and decide the baby could be a blessing for them. The happy couple makes it to the ceremony just in time to walk down the aisle in their jeans and T-shirts. The crowd cheers as Spike and Snake kiss, ready to face any difficulties the future may bring.

After his father dies, Craig is distraught because of the fight they had the last time they spoke. He tries to get his life back on track but it turns out to be more difficult than he thought. JT makes good on his promise to take Liberty to the school dance, where Spinner and Paige are up against Jimmy and Hazel for Luau King and Queen.

It's the start of the school year. For their upcoming anniversary, penniless Spinner wants to get the perfect present for Paige. His idea: get her the perfect locker, since the one she has been assigned she considers in purgatory. In Spinner's mind, Hazel has the perfect locker, but it will take some swift maneuvering to get Hazel to give it up. Emma has thoughts other than school on her mind. With Spike almost ready to give birth and with Spike and Snake's recent marriage, Emma has been thinking about her biological father, Shane McKay. Spike has told Emma nothing about Shane, except that she wants Emma to have nothing to do with him as he deserted them. All Emma vaguely remembers is meeting Shane once in a hospital when she was three years old, Emma remembering that Shane was wearing a doctor's uniform. Emma does whatever she needs to to locate Shane and know her biological dad.

Through Snake's alumni database, Emma does locate her biological father, Shane McKay, at an address in Stouffville. When she arrives at that address, she sees that it is a medical institution and that Shane, mentally disabled, is a patient. Emma's first thought is that her mother is a heartless woman who deserted Shane during his time of need. Emma's view of her mother changes when she learns the full story and why Spike did not tell her the truth about Shane. But Spike may be in trouble when Shane escapes from the institution and wants to see his old girlfriend. Meanwhile, Spinner managed to get Hazel's locker for Paige, who deems it not to be the perfect locker. In her mind, Jimmy has the perfect locker. Jimmy, knowing that Spinner will probably do anything for the locker, makes a deal with Spinner, one not only that Spinner will find embarrassing to do, but one that Spinner does not realize will put Paige in a bad light.

Feeling like a wallflower, Manny decides to try out a new overtly sexual fashion style at school despite it contravening the school's code of conduct. Her attempt at looking sexy has the affect that she is hoping. The person who shows the most interest in her is her long time friend J.T., who is a bit confused about these new feelings he has for his friend. But he has to work fast to attract her attention as others are also showing interest in her. With her new look however is also a new self-absorbed attitude. Meanwhile, Craig, Marco, Jimmy and Spinner have formed a yet unnamed band. Joey has allowed them to use his garage as a practice space. Joey is vicariously reliving his teen-aged years through the band much to Craig's chagrin.

A group of the kids go to the beach for the day. Despite stating that she will no longer be his cover as his girlfriend, Ellie, who doesn't really get along with most of the others but especially Paige, decides to go along on Marco's invitation. Also along as the chauffeur is Paige's openly gay older brother, Dylan. Dylan, attracted to him, suspects Marco may be gay. Marco, also attracted to Dylan, is not ready to come out, especially to his supposed best friend Spinner, who is openly homophobic. Marco goes out of his way to hide his sexual orientation. This includes showing an interest in team sports and going on a date with an unsuspecting Hazel. Meanwhile, Archie is staying at the Jeremiah's temporarily as he has a cold and Spike does not want him to infect Jack. Beyond ruining his weekend with Ashley as the unexpected chaperon, Craig thinks that Snake's symptoms may be a manifestation of something beyond the common cold.

Spinner does not react well to Marco coming out to him. Without initially actually outing Marco to the general populous, Spinner does whatever he can to freeze Marco out of his life. Spinner spreads the news amongst their closest group of friends, all of who think Spinner is acting like an idiot. Marco will need all the support he can when he learns first hand what it's like to be gay in an intolerant society. A specific incident pushes Marco further in the closet. Meanwhile, Snake's initial medical diagnosis is possible leukemia. He tries to make light of the situation, which affects Emma more than anyone. Regardless of the final diagnosis, his actions, in part because of the possible diagnosis of leukemia, benefit Degrassi as a whole.

Snake's illness is causing a strain on Emma and Sean's alone time. Sean, feeling lost without Emma's support, has thoughts of his old troubled life. He starts to gravitate toward trouble-makers Jay, Alex and Towerz. A fight with Emma over their lack of time alone together turns Sean's thoughts into reality. Sean does whatever he feels he needs to be to be accepted, an act which ends up hurting Emma. Meanwhile, J.T. is hanging out with the in crowd - his new friends - leaving Toby in the lurch. At a sleep-over at Toby's, an embarrassed J.T. has a wet dream over Liberty, which Toby lords over him as blackmail in also being able to hang out with the in crowd.

Things are pretty hot between Craig and Ashley, but he's disappointed that she keeps pulling back from going all the way.

Ellie is facing some stresses in her life. Her soldier father has just been shipped overseas, to which her alcoholic mother does not react well. She has an interview for what she considers her dream co-op job working for Caitlin at the radio station doing stories on social causes, but she's up against "perfect" Paige for the sole position. These stresses end up having a physical manifestation, which Ellie, ashamed, feels she needs to hide. Ellie gets an unexpected source of support. Meanwhile, Terri has been receiving roses from a secret admirer. She suspects it's Toby, but really is hoping it's shy Rick.

Emma decides it's time to move on in matters of the heart when she realizes she has feelings for new kid Chris.

Terri is at the top of her game when she lands the lead in the school play and has a wonderful boyfriend in Rick. However, Hazel is concerned when she notices Rick's overly controlling behavior. Spinner fights feeling jealous when JT starts spending a lot of time with Paige.

The Christmas season brings more than just holiday cheer to Degrassi. Caitlin is confused and lonely when she realizes she still has feelings for Joey, who already has an arrogant new girlfriend. Craig gets caught up in his own lies when he continues seeing Manny behind Ashley's back.

Manny threatens to tell the whole school about their relationship if Craig doesn't dump Ashley once and for all. Joey has trouble getting a grip on his emotions after kissing Catlin; should he stay with Sydney or reunite with the girl who got away?

Emma becomes obsessed with getting Sean busted when she suspects he and his gang are stealing things from Degrassi. Paige, Spinner, and Jimmy enroll in a driver's education class and Paige develops a crush on their instructor.

Manny falls flat at her gymnastics meet because she feels nauseous. When her sickness doesn't go away, Manny begins to worry it may be something more than the flu.

Manny and Craig's pregnancy is outed by the furious Ashley to the whole school during lunch. Their failed practice to take care of Spike's baby convinces Manny, but not Craig, that, at 14, she is not ready for motherhood.

Jimmy, Sean, Ellie, Toby, and Hazel land in Mr. Raditch's Saturday detention. Despite their different cliques and different styles, they come to realize the similarities between them and decide to work together to get through their detention.

Terri wants to give Rick another chance but when she has to choose between her friendship with Paige and her love for Rick, the result is tragic. Sean gets annoyed when Marco keeps tagging along on his dates with Ellie.

Craig is determined to beat his ex-girlfriend Ashley when both of their bands are entered in an upcoming battle-of-the-bands competition. After Joey hurts his back in an accident, Catlin steps in to care for him and his daughter Angela.

The year-end Junior Formal is fast approaching, and Marco is in charge, except when it comes to a date. Problem is, Marco's too nervous to ask Dylan out at all, let alone ask him to the prom.

Paige and Spinner decide to take a day off from school. Paige invites Ashley to come along and Ashley announces she's leaving Degrassi. Paige and Spinner have to show her a good time and try to convince her to stay. Meanwhile, Emma discovers Mr. Simpsons will and worries his chemotherapy has failed.

Sean chooses to move out on his own, meanwhile J.T. attempts to ask Manny to the dance.

The end of the year dance has arrived at last! Jimmy wants everything to be perfect for Hazel but nothing goes as planned. Sean's guilt gets the best of him and he confesses to stealing Mr. Simpson's laptop. Earning Mr. Simpson's forgiveness, however, is going to take much longer than Sean anticipated.

Season 4 begins with Paige, Spinner, Marco, Jimmy, and Hazel entering Grade 11. Spinner buys a car with the money he's earned at The Dot, and Paige receives a summons to testify at the trial of the guy who raped her.

The pressure of the trial combined with confronting Dean sends Paige into a destructive downward spiral. Craig receives a generous 16th birthday present from his late father, which causes a rift between Craig and Joey.

Marco faces unexpected hurdles in the race for Student Council President when his opponent Alex threatens to out him to the entire school at the election assembly. Meanwhile, Liberty and Emma have a confrontation of their own when Liberty starts spending time with Emma's ex, Chris.

Rick returns to Degrassi, professing to be a changed man. Everyone is suspicious Rick might hurt another girl the way he hurt Terri so a plan develops to run Rick out of Degrassi for good. J.T. is frustrated with his relationship with Manny because they have barely even kissed yet. When a mishap leads to Manny seeing J.T. naked, J.T. begins to wonder whether their lack of physical contact is because he can't measure up to Manny's expectations.

Sean and Ellie's relationship reaches the next level when Sean wants her to move into his apartment. Is Ellie ready to leave her turbulent childhood home and live with the love of her life? Meanwhile, Manny takes over the Spirit Squad carwash when Paige falls ill.

Paige is sure she will never be able to pay Spinner back for the damages to his car after she gets fired from the DOT. Toby and Rick start a competition to see who can get the most kisses.

Rick makes friends with Emma and Toby when he steps in as a replacement on the school's quiz show. Things take a turn for the worse when Jay, Spinner, and Alex pull a nasty prank on Rick that embarrasses him in front of the entire school. Rick's vindictive side comes out, leading him to develop a horrible plan for revenge.

Humiliated and furious, Rick returns to Degrassi with a handgun in his backpack and prepares to take revenge on the students of Degrassi for laughing at him. Jimmy sympathizes with Rick and promises to back him up whenever other students harass him. Rick accuses Jimmy of being part of the prank and shoots Jimmy in the back when he tries to run away. Rick then moves on to the next person on his hit list: Emma.

In the aftermath of the school shooting, everyone is grieving and making small steps to moving on. Sean refuses counseling because he claims to have everything under control. As the shock wears off, Sean realizes he may not be as well adjusted as he thinks and ventures home to confront his past. J.T. shuns Toby for having been friends with the school shooter.

Despite everything that transpired between them, Craig and Ashley start to develop a friendship. Craig clashes with his band when he suggests Ashley become their new member. Hazel brings Paige along to a yoga class taught by Mr. Oleander, the hot new teaching assistant.

Craig is suffering from mood swings and Ashley seems to be the only one who can help, Ashley's dad is planning to get remarried, elsewhere J.T. and Liberty attempt to work together on the school musical.

Craig proceeds to embarrass Ashley during the reception at her father's wedding. Things go from bad to worse when Joey confronts him.

Paige attempts to get Mr. O alone, while Spinner is disappointed when Manny becomes interested in a new student.

Ever since the trauma of the shooting, Emma has been distancing herself from her friends and neglecting her typical interests. Emma discovers a scandalous secret when she goes to the ravine with Jay but instead of turning everyone in, Emma decides to join in on the raunchy ravine activities.

Emma keeps her "friends with benefits" relationship with Jay a secret and vows not to tell anyone what goes on at the ravine. But when Emma receives some devastating news, can she keep it to herself much longer? Meanwhile, Jimmy is fed up with being pitied and enlists the help of Craig and Marco to sneak out of the rehab center for a concert by his favorite band.

Everyone is thrilled when Jimmy finally returns to school. Unfortunately for Spinner, Jimmy's return means revealing the truth about what happened that fateful day and dealing with the repercussions. Spinner deeply wants to redeem himself but how can he fully be forgiven for telling Rick that the prank was Jimmy's idea? Danny disapproves of the relationship between J.T. and Liberty.

Ellie starts playing cards for fun with Craig, Alex, Dylan, and other friends. However, Alex raises the stakes when she encourages the group to play with real money. Ellie joins the high-stakes game but ends up gambling with her future rather than for fun. Paige has a secret affair with Mr. O and begins to wonder whether he has been telling her the whole truth.

Paige and Matt Oleander desperately try to keep their relationship a secret but it seems to be an impossible mission when Mr. Simpson spies them together at the park and Manny spreads rumors about them to Hazel. Emma has a ladies night and all her girlfriends are head over heals for Emma's new neighbor, Chester.

Dylan would like more from his relationship with Marco, meanwhile Spinner and Jay attempt to break into Degrassi.

The war between Manny and Paige continues when Paige takes credit for Manny's choreography in the Spirit Squad's last routine of the year. Manny reaches the breaking point and starts plotting appropriate revenge. Catlin interviews Kevin Smith about his new project called "Jay and Silent Bob Go Canadian, Eh!".

Craig is upset Ashley is going away to London for the summer because he fears she will dump him for someone else. He plans to show up in London to surprise her but his romantic gesture terribly backfires. Jay and Silent Bob start shooting their movie and Caitlin makes a big mistake after going to a bar with Kevin Smith.

Craig leaves London heartbroken because of Ashley's rejection. His ever-so-fragile mental stability is pushed to such a breaking point that Craig seeks solace by living in the Degrassi boiler room.

Manny pursues her dream of being a Hollywood actress but is faced with the cruel realities of show business. Manny, desperate for stardom, contemplates plastic surgery after harsh criticism from a caustic casting agent. Craig receives a disappointing birthday gift from Ashley.

Manny's still foggy on what exactly it was that happened at Peter's party the night before. She knows she made a pretty racy video but Peter will erase everything... or so he says.

Paige proceeds to make a bad choice -- one which could ruin her life.

J.T. and Liberty's relationship issues come to a head when Liberty gives J.T. some alarming news. Liberty takes a very practical approach to the problem because she doesn't think J.T. is mature enough to handle it. Once the shock wears off, J.T. realizes it's time for him to grow up. Spinner pursues a relationship with Darcy and finds her lifestyle more appealing than he originally thought.

Craig's decision to focus on school instead of girls goes out the window when Ellie and Manny start competing for his heart. Joey feels flattered when a younger woman asks him out but is embarrassed when he hears her friends making fun of him.

Jimmy develops a passion for drawing and art after putting his basketball career behind him. Ellie helps him with his new talent until she discovers Jimmy is sabotaging his chance at stardom and his relationship with Hazel. Danny agrees not to tell anyone about Liberty's pregnancy if J.T. finishes a school project for him.

J.T. is under a lot of stress and starts to fold under the pressure. Liberty is six months pregnant and J.T. discovers he can't afford to take care of himself, Liberty, and a baby. Desperate for money, J.T. starts stealing drugs from the pharmacy and selling them to a drug dealer. Emma goes on a date with Derek but ends up being far more attracted to Peter.

J.T. wants out of selling drugs but the dealer refuses to let him quit. A path of self-destruction and lies causes J.T. to lose the people he cares about most. Snake faces similar obstacles when he recounts all the regrets in his life.

Marco takes a big step in deciding to tell his father about his sexuality. Emma's relationship with Peter puts a strain on her friendship with Manny.

The one-year anniversary of the school shooting opens old wounds for many Degrassi students. Spinner is rejected by Jimmy yet again so Darcy invites him to a weekend retreat to cheer him up. Jay lies to Darcy by telling her Spinner is a guy only interested in sex; if she wants to keep him, she must have sex with him. What means more to Darcy: her personal beliefs or her boyfriend? Hazel becomes increasingly jealous when Ellie and Jimmy start spending time together.

Kevin Smith and Jason Mewes return to Degrassi and Toronto for the premiere of their Degrassi-filmed movie, "Jay and Silent Bob Go Canadian, Eh!". The premiere gets everyone at Degrassi into a frenzy and vying for the hard to come by premiere tickets. Upstaging the spectacle of the premiere are Alex and Paige, who are each other's dates for the evening. From the heat they create at the premiere and the after premiere party, which they manage to crash, they move their evening to more serious matters as Paige witnesses the turbulence of Alex's home life first hand, to a quieter and more emotional ending to the night. On a more secretive level, Peter and Emma are each other's unofficial date for the evening, as Emma still needs to respect best friend Manny's distrust of Peter. Emma and Peter's evening reaches an almost romantic climax, this climax however interrupted as they witness an even more clandestine liaison than theirs, that between Emma's stepfather, Snake, and Peter's mother, Principal Hatzilakos.

Paige and Alex are confused and uneasy after their encounter; Paige turns to an unlikely source for help with her sexuality. Emma tries but she can't keep the secret about what she saw Snake doing at the movie theater.

Craig and his band finally get their big break when a company in Vancouver offers them a record deal. Liberty takes on far more projects than she can handle in her condition and ends up going into labor.

Emma, with help from Manny, tries to cheer up Spike on her separation from Snake, especially as it is Spike and Snake's third wedding anniversary. They call in Caitlin from Los Angeles for some female bonding. Just after Caitlin arrives, Snake returns home, just to give Spike an anniversary gift he had purchased months earlier. After Snake leaves, Spike opens the package to find a sapphire necklace - her birthstone - and although she looks touched by the gift, throws it into the garbage. They also plan a female only anniversary party, complete with stripper waiters. The festivities come to a complete halt when one of the strippers physically resembles Snake; after the party, she admits to herself and to Caitlin that she still loves Snake. Meanwhile Spinner remains in limbo between his old friends and his new Friendship Club support network. At a school fair where Spinner sits as the target in the Friendship Club's dunk tank, a still angry Jimmy continually dunks Spinner, and would continue to do so if given the chance. However Marco and Spinner tentatively reconnect. This reconnection is put to the test as Linus, the most extreme of the Friendship Club members, asks Spinner to intercede with Marco in his plans to hold a safer sex seminar as Linus believes that such a seminar promotes sexual activity rather than abstinence which is the only form of safe sex Linus supports. After Miss Hatzilakos reconfirms her support for the seminar, Linus and Spinner decide to hold a protest at the seminar, at which a confrontation complete with derogatory remarks and fisticuffs ensues specifically between Linus and Marco. This confrontation brings Spinner's true allegiances into a clearer light.

Emma, Manny, Spike and Jack are still trying to live without Snake. Manny is desperate to lose weight for an interview with an agent and Emma is happy enough to control one more thing like what they eat. They go on a major diet, barely eating, binging and throwing up and running too much. Snake is tired of staying at Joey's and really wants to come home. Emma tries to help, but to no avail. She's also trying to keep her relationship with Peter on the down low. Manny loses the pounds she wants too, and Snake manages to re-woo Spike and come home but Emma still feels the need to stay on the diet.

Emma, still on her dangerous diet, tries to make up excuses to friends and family about why she's not eating and is having problems. She alienates Manny and tells her she's dating Peter. Peter finds out about Emma's eating disorder and goes to Manny, the two of them talk to Snake and Spike and all of them try to intervene and save Emma. She ends up having a panic attack and passing out, sending her to the hospital. Meanwhile, Paige wants Alex and Hazel to get along, which is like getting water and oil to mix without the egg. They eventually manage to get along because Paige is their egg.

Facing the pressure of year-end exams, the furthest thing from Marco's mind is what happened a year ago - when Dylan stomped all over his heart. Marco takes this as a sign that he's over Dylan for good.

What's old becomes new again for Alex, Paige and Spinner. Alex and Paige are facing their future post-Degrassi, Paige on a calculated, planned path to university at Banting, and Alex on a more spontaneous "in the moment" path. Paige expects Alex to follow her to Kingston, whereas Alex doesn't want to follow someone as she needs to find her own life. Spinner and Darcy are living in the moment, enjoying their relationship. Spinner tells little white lies to Darcy specifically regarding his past relationship with Manny and their, or supposed lack of sexual history. Darcy finds out the truth from Manny, which results in an all out cat-fight. From this, Spinner declares his want to purify himself and become a virgin once again. Despite this act, Darcy once again questions his motives when he admits that Manny was not his only past sexual partner. He thus feels that he will never fit into Darcy's mold of what she wants him to be. As a result of their problems, both Paige/Alex and Spinner/Darcy break up. Needing some comfort, each turns to old support. Alex ends up having Jay's shoulders to cry on, nothing more than that as she states emphatically to him that she really is a lesbian and Paige was her first true-to-herself relationship. Spinner and Paige turn to each other, realizing that old feelings for each other come to the surface.

It's approaching graduation, a time for moving on for some. Both Ashley and Craig return to Degrassi from London and Vancouver respectively to visit with old friends and perhaps return to school the following year. Jimmy is not one who will be moving on from Degrassi just yet as his time away from school, despite his hard work, has left him a few credits short from graduating with his class. He is still feeling sorry for himself being in a wheelchair, but encouragement from friend Ashley may help. Her first words of encouragement fall flat however. Jimmy likes Ellie and Ashley believes that Ellie likes Jimmy based on some comments she's made. Based on this information from Ashley, Jimmy tells Ellie that he wants to take their friendship to the next level. However it is not Jimmy that Ellie has relationship feelings for, but Craig. Jimmy is feeling unattractive in his wheelchair, but a passionate kiss from Ashley bolsters his confidence, not only with himself but with his lot in life. From this, he buries the hatchet with Spinner. Spinner is having relationship issues of his own. The kiss with Paige has left him a bit confused, but Darcy asks him to take her back, which he does. This return to Darcy leaves Spinner the task of telling Paige that nothing beyond that kiss can happen, however before he can do so, another tender moment with Paige leads to going all the way. Spinner really has to make some decisions and text messages Marco what happened with Paige and asks for advice. However his decisions are made for him as Paige is moving on from Degrassi post-graduation which does not include Spinner, and Darcy sees the text messages which leads to her dumping Spinner. His renewed friendship with Jimmy makes Spinner realize that he needs to take what he wants out of life and runs after Darcy before she leaves for Bible camp for the summer. Although she doesn't trust him since he broke his purification vows so easily, the last glance back before she gets on the bus leaves him with some hope.

Ellie learns a difficult lesson about dating in the workplace. Mia gets the upper hand on Anya and Holly J. during a school project.