Jesse comes home from his band's summer concert tour to find out that Becky is having twins. Meanwhile, Michelle is scared and lost on her first day of kindergarten, so she goes to the other side of the school and pays Stephanie a visit.

Michelle badly wants a mother, but her choice turns out to be her kindergarten teacher (June Lockhart), who is twice Danny's age. Meanwhile, D.J. and Kimmy trade places for one night for a school project, much to the Tanners' dismay.

After Stephanie went too far in invading D.J.'s privacy, she no longer wants to share a bedroom with her, and thanks to an untimely insult, neither does Michelle, so Stephanie moves into the upstairs bathroom. Meanwhile, Danny and Joey fall for Becky's childbirth instructor, and Jesse gets fed up over Becky's food cravings during her pregnancy.

Danny starts to feel that D.J. is excluding him from her social life, even after he granted her wish of her own bedroom last time, so he starts snooping and discovers a secret of hers. Meanwhile, since Michelle and Stephanie are now sharing a bedroom, Stephanie wants Michelle to take down all of her "baby stuff". Joey and Jesse get locked in the basement.

Jesse skips a family picnic to work on writing a song, but ends up regretting it. A man who looks a lot like Elvis Presley becomes Jesse's conscience, counseling him on the importance of family and advising him to go to the picnic.

Joey has a streak of good luck. His childhood idol Ranger Roy (Barney Martin), the host of a children's program, is retiring, and Joey is confident to audition. However, his luck goes bad after innocently angering Roy by hugging him (due to acute physical paranoia), but when the show becomes a disaster, Joey uses his antics to save the day. Becky and D.J. are curious why Jesse wants good names for the twins, and Stephanie tries to get rid of Michelle's tap shoes.

Note: Jesse's real name is revealed in this episode. His birth name was Hermes Katsopolis, but begged his mother to change it to Jesse after being teased in kindergarten.

D.J. volunteers at a local nursing home, and befriends a man named Eddie (Whitman Mayo) with Alzheimer's disease. Meanwhile, Jesse tries to prove to Becky he can support a Lamaze pad; Stephanie and Kimmy argue over which of their family dogs is smarter, and decide to hold a neighborhood dog show in the back yard to decide.

Stephanie decides to pursue dancing full-time, but she does not realize it is a major commitment that she may not be ready for. Rebecca has her baby shower, which Michelle accidentally spills the beans on after Jesse bribes her with an ice cream sundae.

As Michelle is waiting for her fifth birthday party (with a Flintstones theme) to start, the entire family looks back at all the good times from Michelle's life. Michelle gets upset however when she realizes her baby book will end.

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Michelle's birthday party is interrupted by Becky going into labor, and Jesse having appendicitis. In the end, Becky gives birth to twin boys: Nicholas and Alexander (Nicky and Alex) and although the gang tells Michelle that they are sorry her birthday got ruined, she tells them it didn't matter as Rebecca having Nicky and Alex on her birthday was the best one ever. Note: This is the first appearance of Nicholas (Nicky) and Alexander (Alex). This was the last episode of the series to be written by series creator Jeff Franklin.

Back home from the hospital, Jesse can't tell his identical twin sons, Nicky and Alex, apart, so he enlists Stephanie and D.J.'s detective kit to help him identify who's who. Meanwhile, Danny likes his new, temporary co-host, Vicky Larson (Gail Edwards). Elsewhere, Michelle is upset when D.J. and Stephanie get to hold the twins but she can't.

Danny is chosen as "Bay Area Bachelor of the Month", much to the disapproval of Michelle - and Vicky. Jesse and Becky deal with the stresses of twins.

Joey teaches Michelle how to ride a bike without training wheels, and is unsuccessful in their first attempt, but convinces her to try again. Meanwhile, Jesse and Becky prepare for the twins' first car trip to the over-kissing Aunt Ida. Danny begins to get intimate with Vicki.

While babysitting her sisters, D.J. decides to take them to the movies with her when her crush (Scott Weinger) drops by unexpectedly. However, Stephanie & Michelle use all the money for snacks, leaving not enough money to pay for them. D.J. convinces Kimmy, who works at the theater, to sneak them in, but they are caught by the manager. Will Kimmy lose her job and Danny find out? Kimmy keeps her job and Danny found out and all three of them are punished.

Note: This marks Scott Weinger's first appearance on the show as Steve before he becomes a regular in season 6. In this episode, his character's last name is Peters (later Hale).

With Becky going back to work, Jesse becomes "Mr. Mom", while also trying to pursue a record deal. Meanwhile, Danny deals with Vicki leaving, and Stephanie accidentally stains D.J's sweater, which she had told her not to wear.

Stephanie's favorite singer, Tommy Page, sings a special song at her tenth birthday party. Afterwards, he signs her CD with the word "love." So Stephanie assumes he's in love with her, and then when D.J. kisses him, friction happens between the sisters. When the issue hits its boiling point, Danny must step in and get to the root of this issue.

Stephanie is confident that she will win her school's spelling bee, only to get beaten by a rival classmate on the first word. She is very angry about this. In the subplot, Michelle wants to learn how to read.

Danny's younger sister, Wendy, stops by for a visit - with her pet monkey who likes Jesse and plays hide-and-seek with Joey. Meanwhile, Joey falls for Wendy and Danny is not very pleased, and Stephanie and Michelle get worried by a shipment for Wendy: a tiki head (which turns out to be nothing more than a bank).

Michelle's conscience gets the best of her after she mishandles Jesse's musical equipment. Angry at Jesse for being "Uncle Tattletale", she then runs away to her friend Teddy's house. Teddy's older sister is played by Tahj Mowry's real-life sisters Tia and Tamera Mowry. The subplot has D.J. trying to get Stephanie and Kimmy to become friends.

Note: The Olsen twins are both in this episode; Ashley as the bad Michelle and Mary-Kate as the good Michelle.

D.J. gets her learner's permit, only to tense up from driving lessons with "uptight" Danny and "laid back" Uncle Jesse. Meanwhile, Michelle tries to get revenge on Stephanie after she nearly scares her to death, and succeeds with a little help from Joey.

Jesse and Rebecca imagine how each other's unique parenting techniques may affect the twins in the future. Meanwhile, Danny takes Joey and the girls out to "family fun night" after the girls fight about Stephanie getting irritated by D.J. hogging the bathroom she denies it because she was in there first since it's right across from her room and Stephanie turning off Michelle's Beauty and the Beast video after she played it for the 100th time despite trying to learn the words, maybe the whole script, which turns into Family Public Embarrassment Night (the family dressed up as pirates and walked the plank as the whole restaurant watched, including D.J.'s friends from school).

The family becomes irritated when Danny becomes too obsessed over "Spring Cleaning Day", especially with Michelle on board. Meanwhile, Jesse doesn't believe Becky when she says the twins are crawling.

D.J. goes out on a date with a heavy-metal band member to the drive-in. This causes Danny, Jesse, and Joey to go "rescue" her. Meanwhile, Kimmy babysitting leads to some feeding and changing disasters.

Michelle decides that it is better to be a boy after her best friend, Teddy, is hassled for hanging out with girls. Meanwhile, Jesse becomes Ranger Joe's sidekick Lumberjack Jess, and D.J. threatens to get back at Stephanie for her constant prying.

Jesse records "Forever" with The Beach Boys, and finally gets a record deal. D.J. tries to convince her dad to let her participate in a summer study program in Barcelona, Spain. Michelle tries to learn how to cook.

The record company ends up completely ruining Jesse's song, much to Jesse's resentment, and he leaves the recording session, only to be inspired by Michelle. Meanwhile, Kimmy tries to get to go to Spain (for which she must pass her final exam and the course) with D.J. and Michelle tries to get an ant farm.

Guest stars: Brian Robbins and Martha Quinn