Episode: 125 | Aired: September 21, 1989
Denise returns from Africa with a pair of surprises. One is a husband, Martin, and the other is a stepdaughter, Olivia.
Episode: 126 | Aired: September 28, 1989
Theo blames Cliff when he is forced to leave his apartment for trying one of Cliff's tricks.
Episode: 127 | Aired: October 05, 1989
Vanessa goes to an unsupervised party with Denise and gets drunk.
Episode: 128 | Aired: October 12, 1989
Cliff gets acquainted with his new step-granddaughter Olivia.
Episode: 129 | Aired: October 19, 1989
After receiving a mediocre grade on a test; Theo and The Huxtables discover that he is dyslexic.
Episode: 130 | Aired: October 26, 1989
Denise and Olivia baby-sit Sondra and Elvin's twins and wind up destroying their apartment.
Episode: 131 | Aired: November 02, 1989
Rudy learns etiquette in school and develops a crush on a classmate. Elaine Stritch and Tatayna Ali guest star.
Episode: 132 | Aired: November 09, 1989
Cliff dreams he, Theo, Martin, and Elvin are pregnant. He develops new appreciation for women.
Episode: 133 | Aired: November 16, 1989
The Huxtables host a large gathering for Thanksgiving dinner, including surprise guest Paula, Martin's ex-wife.
Episode: 134 | Aired: November 30, 1989
The Huxtables and the Kendalls meet for the first time. Moses Gunn guest stars.
Episode: 135 | Aired: December 07, 1989
Against her better judgment, Clair leaves Cliff in charge of the household.
Episode: 136 | Aired: December 14, 1989
While their wives are out shopping, Cliff and Martin get better acquainted.
Episode: 137 | Aired: January 04, 1990
Elvin takes an old girlfriend to dinner and stayed up later than expected which upsets Sondra. Tonya Pinkins guest stars.
Episode: 138 | Aired: January 11, 1990
A sausage hero before bedtime gives Cliff one heck of a nightmare. FACTOID: The monsters in Cliff's dream are the creations of Muppet master Jim Henson, and the episode was dedicated to his memory.
Episode: 139 | Aired: January 18, 1990
Denise's attempt to play matchmaker for Vanessa backfires, leaving her in a sticky situation.
Episode: 140 | Aired: January 25, 1990
The Huxtable household gears up for Olivia's fourth birthday party.
Episode: 141 | Aired: February 01, 1990
Legendary bluesman B.B. King visits the Huxtables, and provides some relationship advice to Theo.
Episode: 142 | Aired: February 08, 1990
Rudy pockets the dry-cleaning money to make up for her lack of allowance.
Episode: 143 | Aired: February 15, 1990
Rudy has to perform a dance at school but feels self-conscious so she and Olivia take tap-dancing lessons.
Episode: 144 | Aired: February 22, 1990
The Huxtable men bet on who can buy the most romantic gift without spending more than twenty-five dollars.
Episode: 145 | Aired: March 15, 1990
Cliff and Clair learn Theo has moved in with his girlfriend. Denise considers going back to college.
Episode: 146 | Aired: March 22, 1990
Family and work stress take their toll on Clair. Cliff tries to wisk her away for a romantic weekend but things don't go exactly as planned.
Episode: 147 | Aired: April 05, 1990
Vanessa and her friends sneak off to Baltimore for a concert, with predictably dire consequences.
Episode: 148 | Aired: April 19, 1990
Clair squares off against her friend Bernadette when a community center is in danger of losing its playground; the Huxtables' neighbor Jeffrey undergoes a lifestyle change after his wife leaves him. Mercedes Ruehl and Wallace Shawn guest star.
Episode: 149 | Aired: April 26, 1990
Denise contemplates quitting college after her Hillman credits fail to transfer. Max Roach guest stars.
Episode: 150 | Aired: May 03, 1990
Cliff's 98-year-old great aunt Gramtee comes to town to celebrate her birthday. Minnie Gentry, Mavis Staples, and The Friendship Choir guest star.