4x1 - Call of the Wild

September 24, 1987

The newlywed Sondra and Elvin return from their honeymoon with shocking news for Cliff and Clair: they want to abandon their dreams of being a lawyer and doctor and open an outdoorsman's "wilderness store." Geoffrey Owens (Elvin) becoms a regular cast member.

4x2 - Theogate

October 1, 1987

Theo and Cockroach come home unusually late from a track meet, and the Huxtables got a phone message earlier from the track coach. They both deny anything out of the ordinary happened, but attorney Clair knows better. A mock trial is held for Theo and Cockroach at the Huxtables' for Clair to get to the bottom of the situation.

4x3 - It's Not Easy Being Green

October 8, 1987

Rudy wants to wear summer clothes in winter to a party, while Cliff tries to get rid of an old water heater.

4x4 - Cliff's Mistake

October 15, 1987

While setting up the house as a "haunted house" for Halloween, Cliff discover's he's lost a power drill that his neighbor loaned to him. First appearance of Wallace Shawn as Jeffrey Ingalls.

4x5 - Shakespeare

October 22, 1987

Christopher Plummer and Roscoe Lee Browne appear. Theo must read Julius Caesar for school, but complains that it is boring. Russel and his friends read scenes from the play aloud, and Theo is enthralled. Later, the men read from a different work of literature-a story Rudy wrote!

4x6 - That's Not What I Said

October 29, 1987

Cliff and Clair have a marital argument after Theo gets detained by police for riding in a car with an unlicensed driver.

4x7 - Autumn Gifts

November 5, 1987

Rudy goes to an older widowed lady's house each afternoon to have tea and play cards, but notices that she refuses to take her daily medication for diabetes. She tells Cliff, who devises a plan to try to convince her that she needs the meds to live. Eileen Heckart appearance. Keshia Knight Pulliam appears on the episode of A Different World which airs later that evening.

4x8 - Looking Back (1)

November 12, 1987

Sondra and Elvin have their first marital fight, and Elvin comes to the Huxtable house for comfort and support. Clair shares about the difficulties in their house as flashbacks are shown.

4x9 - Looking Back (2)

November 12, 1987

Flashbacks are shown while history is shared with Elvin.

4x10 - Where's Rudy?

November 19, 1987

Theo and Vanessa lose track of Rudy in a mall while Clair enters a squash exhibition. Earle Hyman (Russell) appears on the episode of A Different World which airs later that evening.

4x11 - Dance Mania

December 3, 1987

Theo and Cockroach have tickets to appear on television on the dance show "Dance Mania", but are told that only one of them can enter the studio during the filming because of fire laws. Theo miscalculates by offering to let Cockroach go in (thinking he'll refuse) and gets angry when Cockroach takes him up on the offer.

4x13 - The Show Must Go On

December 17, 1987

Vaudeville is shown to Rudy and her friends, who are unimpressed.

4x14 - Bookworm

January 7, 1988

Clair drags Cliff to her book club meeting, and he's the lone male there. Much to Clair's surprise, Cliff knows quite a bit about the book in question! Meanwhile, the kids attempt a sleepover at Sondra and Elvin's run-down studio apartment, but are overwhelmed by the noise and lack of utilities. Appearances by Angela Bassett and S. Epatha Merkerson.

4x15 - Twinkle, Twinkle Little Star

January 14, 1988

Rudy has to play the violin in music class at school, but gets jealous because she thinks her classmates' instruments are more fun. Deon Richmond as Kenny. Naoka Nakagawa as Kim.

4x16 - The Visit

January 21, 1988

Theo visits a friend in the hospital who has cancer. Troy Winbush as Denny. Adam Sandler as Smitty. Special appearance by Armand Hammer.

4x17 - The Drum Major

February 4, 1988

Vanessa tries out for the drum major at school. Theo playfully mocks her efforts, but learns from friends that Vanessa is the target of sexism and intervenes on her behalf. Meanwhile, Cliff cooks up a batch of extremely spicy chili as Russell tries to pay off a loan from an old friend. Deon Richmond as Kenny. Troy Winbush as Denny. Guest appearance by Dub Taylor.

4x18 - Waterworks

February 11, 1988

Clair tries to stop Cliff from fixing a leaky pipe by hiring a team of professionals: friends of Sondra and Elvin from Princeton.

4x19 - Once Upon a Time

February 18, 1988

Rudy writes a fairy tale, and the colorful story is acted out in her fantasy. Members of the family play the roles of a village full of happy people and a mean group that ruins their fun. At the end of the episode, Rudy declares that when she becomes "president of the world", she will put a stop to all mean people. Cliff and Clair proceed to watch news reports of weapons' testing and bombings, and urge her to "hurry, because we need you right now." Earle Hyman as Russell.

4x20 - Petanque

February 25, 1988

Cliff and a friend play pétanque. First appearance of Sullivan Walker as Dr. James Harmon.

4x21 - Trust Me

March 3, 1988

A friend of Clair's has marital problems; Cliff takes a "mini-vacation" in the house as Theo, Rudy, and Vanessa try to stump each other with riddles.

4x22 - Home for the Weekend

March 17, 1988

Denise comes home from college, but seems to have more time for her friends than for the family.

4x23 - The Prom

March 24, 1988

Theo, Denny and Smitty go to great lengths to impress their dates for the senior prom but fail disastrously; Cliff and Clair relive their own prom. Troy Winbush as Denny. Adam Sandler as Smitty. First appearance of Michelle Thomas as Justine. Phylicia Rashād appears on the episode of A Different World which airs later that evening.

4x24 - Gone Fishin'

April 28, 1988

When the Huxtable men go fishing, Theo catches a dead body, and soon attracts attention from the media. This success goes to his head, while Rudy and Kenny find a nest of baby birds, but the mother bird is missing. The two stories eventually cross in a surprising-and rather humiliating-lesson for Theo. Deon Richmond as Kenny.

4x25 - Episode 25

May 5, 1988