House’s ex-girlfriend Stacy Warner (guest star Sela Ward) returns - not to be with House, but to get his help for her ailing husband. While House decides whether or not to take the case, Cuddy instructs him to substitute for a sick professor and present a lecture to a class of medical students. As he weaves the stories of three patients (including guest star Carmen Electra) who all present with a similar symptom, House gives a lecture the students will never forget. In the end, they come out with a broader understanding of diagnostics and House’s team comes out with a greater understanding of him.

Sabrina's job as a magician's assistant is short-lived when she accidentally makes her boss disappear.

Stephanie is upset when the boy she asks to a school dance never arrives. Danny confronts him, embarrassing Stephanie. Jesse tries relaxation to lower his high blood pressure but is annoyed by Kimmy's ostrich.

Cory realizes that breaking up with Topanga was a mistake, and he travels all the way to Walt Disney World to try and win her back.

When the CSI team is called in to investigate a man who is shot at point-blank range in a local casino, they shut down the entire building to find their killer. (TV-14)

Mary undergoes surgery after getting hit by a car and Annie prays for strength to forgive her father.

Eric and Annie decide to celebrate their anniversary by renewing their wedding vows.

Annie blows a fuse when her recently widowed father comes to town with his new girlfriend. Wait till she finds out that Mary's new boyfriend has a son!

When Matt catches the younger kids snooping, he sets a trap. But he catches Dad instead.

Lucy's friend is killed in a tragic car accident, and Lucy feels that she's to blame.

The Camden house feels like Heartbreak Hotel when Wilson and Mary split up and Matt gets a "Dear John" letter from Heather.

Mom and Dad are concerned about Mary's involvement with her boyfriend especially when they get some shocking test results back!

Moesha's father arranges a reunion of Moesha's childhood playgroup (his motive is to sell Saturns). Moesha goes on a date with her former play group friend Matt, who is white, and they experience intolerance and racism from people who don't even know them.

The newest member of the CSI team, Jo Danville, a former FBI agent, is welcomed to her new job by stumbling upon the body of a young woman murdered somewhere in the building that houses the NYPD Crime Lab. (TV-14)

Eric's stress level soars when his family experiences growing pains.

Mary returns home and her siblings stage a protest against Annie's favoritism.

Mary, Lucy, and Matt spend their Valentine's Day heartbroken and dateless.

Robbie adopts a hands-off policy when Mary comes home for the summer.

Mary and Lucy realize they need closure from their past breakups.

Robbie spends time with a girl that looks identical to Mary.