Beverly Hills, 90210

Pilot, Parts 1 & 2: "Class of Beverly Hills" (recap)
Original airdate: 10/4/1990

The pilot of Beverly Hills, 90210 spawned the popular television genre of pretty white teenagers with problems.
Episode 1: "The Green Room" (recap)
Original airdate: 10/11/1990

The Minnesota twins make rich friends and save a Dumb Betty from drinking and drowning.

Episode 2: "Every Dream Has Its Price" (recap)
Original airdate: 10/18/1990

A wild child gets Brenda in trouble for shoplifting, and Brandon finds a terrible restaurant job.
Episode 3: "The First Time" (recap)
Original airdate: 10/25/1990

Brandon's old girlfriend comes to town, puts out, but then turns out to be a bigger head-case than anyone could ever have guessed.
Episode 4: "One on One" (recap)
Original airdate: 11/1/1990

Brandon tries out for the basketball team and gets mad at an out-of-district minority student who, it turns out, is allowed to attend West Beverly because his father works for the city library.
Episode 5: "Higher Education" (recap)
Original airdate: 11/15/1990

Brandon cheats in history class then alienates Ahn-drea and his crusty old teacher, and Brenda leaves dye in her hair all night and wakes up with a frizzled mess.
Episode 6: "Perfect Mom" (recap)
Original airdate: 11/22/1990

Kelly's mom gets coked up and tries to host a fashion show, and Brenda's inner bitch joins the cast.

Episode 7: "Seventeen Year Itch" (recap)
Original airdate: 11/29/1990

When the 17-year Walsh marriage loses its romantic spark, Cindy starts dating her old college boyfriend.
Episode 8: "The Gentle Art of Listening" (recap)
Original airdate: 12/6/1990

Brenda volunteers at the Rap Line, takes a call by accident, and then totally violates the anonymity of a traumatized girl.

Episode 9: "Isn't It Romantic?" (recap)
Original airdate: 1/3/1991

Dylan and Brenda start a romantic relationship even after he freaks her out with his anger management problem and then pulls a no-show on one of their dates.
Episode 10: "B.Y.O.B." (recap)
Original airdate: 1/10/1991

Brenda and Brandon have a house party while their parents are out of town, and Brandon gets arrested for driving while schnockered. 
Episode 11: "One Man and a Baby" (recap)
Original airdate: 1/24/1991

Brandon meets a cute girl under a tree, asks her out, and is dismayed when he finds out she's a baby mama.
Episode 12: "Slumber Party" (recap)
Original airdate: 1/31/1991

Brenda's slumber party gets hijacked by Kelly's bitchy friend, who forces Kelly to tell everyone the sad story about the popular jock who doinked her in the woods and never spoke to her again.
Episode 13: "East Side Story" (recap)
Original airdate: 2/14/1991

The Walshes allow Anna's niece to use their home address so she can enroll at West Beverly High, and Brandon instantly falls for her but soon becomes a very clingy admirer. 
Episode 14: "Palm Springs Weekend" (recap)
Original airdate: 2/21/1991

David invites Steve, Kelly, and Donna to stay at his grandparents' Palm Springs house when he assumes they're away on vacation, and then acts like a total douchebag toward them when he discovers that they cut short their cruise and came home early.
Episode 15: "Fame is Where You Find It" (recap)
Original airdate: 2/28/1991

Brandon gets a role on a lame TV show, so Brenda temporarily fills in for him at the Peach Pit and turns her job into a one-woman show starring herself as a ditzy waitress.
Episode 16: "Stand (Up) and Deliver" (recap)
Original airdate: 3/7/1991

Brandon launches a vacuous campaign when he runs for student council president, and Brenda tells her family she's moving out...but is really just house-sitting an older friend's apartment for three days.
Episode 17: "It's Only a Test" (recap)
Original airdate: 3/28/1991

Brenda becomes more prickly than usual after she discovers a lump in her breast, which luckily turns out to be a non-cancerous tumor.
Episode 18: "April is the Cruelest Month" (recap)
Original airdate: 4/11/1991

Matthew Perry plays a high school senior who writes a really terrible screenplay, which Brandon worries might be a warning sign that he's a psycho nut who's about to shoot his father.
Episode 19: "Spring Training" (recap)
Original airdate: 4/25/1991

Brandon has a terrible experience coaching a baseball team filled with lippy, self-entitled Beverly Hills rich kids, who make fun of their underprivileged opponents during a couple of practice games.
Episode 20: "Spring Dance" (recap)
Original airdate: 5/3/1991

Kelly asks Brandon to go to the spring dance, Brenda loses her maidenhead to Dylan in a hotel room during the spring dance, and Steve gets upset that no one remembered his birthday.
Episode 21: "Home Again" (recap)
Original airdate: 5/9/1991

Papa Walsh is offered a promotion and a big salary increase if he takes a job in Minneapolis, but his family and all of his kids' friends don't care about his career advancement opportunity and want them to stay in California.