S6E1 - Denise: The Saga Continues
Denise returns from Africa, with a new husband and stepdaughter in tow. Joseph C. Phillips and Raven-Symoné join the cast as Martin and Olivia Kendall. Last appearance of Peter Costa as Peter.
Sept. 21, 1989, midnight
S6E2 - Surf's Up
After recreating one of Cliff's stories, Theo and his roommates are kicked out of their apartment. First appearance of Keith Diamond as Danny. Guest appearance by Anthony Quinn.
Sept. 28, 1989, midnight
S6E3 - I'm 'In' With the 'In' Crowd
Vanessa and her friends get drunk playing a drinking game. Pam Potillo as Janet. Elizabeth Narvaez as Kara.
Guest appearance by Bill Cosby's real-life daughter Ensa Cosby, upon whom the character Vanessa is loosely based.
Oct. 5, 1989, midnight
S6E4 - Denise Kendall: Navy Wife
Denise forgets to respond to a letter from the Navy and confirm that she and Martin want housing on the naval base in Rhode Island.
Oct. 12, 1989, midnight
S6E5 - Theo's Gift
Theo is diagnosed with dyslexia, a learning disability which contributed to the academic problems he has had over the years. Michelle Thomas as Justine.
Oct. 19, 1989, midnight
S6E6 - Denise Kendall: Babysitter
Denise and Olivia babysit Winnie and Nelson (Sondra and Elvin's twins).
Oct. 26, 1989, midnight
S6E7 - Shall We Dance?
Rudy and one of her classmates have a crush on each other, but peer pressure could ruin things. Guest appearance by Elaine Stritch.
Nov. 2, 1989, midnight
S6E8 - The Day the Spores Landed
Cliff dreams that men worldwide have become pregnant -- including his son Theo, his sons-in-law Elvin and Martin, and himself. Voice-over by NBC News correspondent John Palmer.
Nov. 9, 1989, midnight
S6E9 - Cliff's Wet Adventure
Denise invites Martin's ex-wife Paula for Thanksgiving dinner. Clair continues to send Cliff to the store for last-minute groceries, despite the fact that it is a cold and rainy Thanksgiving Day. Victoria Rowell as Paula.
Nov. 16, 1989, midnight
S6E10 - Grampy and Nu-Nu Visit the Huxtables
Martin's parents (Olivia's grandparents) come for a visit. Actor Moses Gunn and jazz singer Nancy Wilson guest star as Martin's parents.
Nov. 30, 1989, midnight
S6E11 - Cliff la Dolce
Cliff is in charge while Clair and Denise are out of town. Guest: Elaine Stritch as Mrs. McGee
Dec. 7, 1989, midnight
S6E12 - Getting to Know You
As Christmas approaches, Cliff and Martin get to know each other better. Denise and Martin recreate their wedding ceremony, which allows Cliff to give his daughter away.
Dec. 14, 1989, midnight
S6E13 - Elvin Pays for Dinner
Elvin takes two female college friends to dinner to reminisce and Sondra becomes very upset.
Jan. 4, 1990, midnight
S6E14 - Cliff's Nightmare
Guest appearance by The Muppets (Performed by Jerry Nelson, Dave Goelz, Richard Hunt, and Kevin Clash.) Voice-over by Wallace Shawn.
Jan. 11, 1990, midnight
S6E15 - Denise Kendall: Singles Counselor
Denise causes trouble while trying to help Vanessa get a date.
Jan. 18, 1990, midnight
S6E16 - The Birthday Party
Olivia's 4th birthday.
Jan. 25, 1990, midnight
S6E17 - Not Everybody Loves the Blues
Theo thinks about proposing to Justine. Kenny, who was "born to sing the blues," gets the chance to sing with a legendary blues singer/guitarist. Deon Richmond as Kenny. Michelle Thomas as Justine. Guest appearance by B.B. King
Feb. 1, 1990, midnight
S6E18 - Rudy's Walk on the Wild Side
Rudy steals money from Clair to buy a sweatshirt (Rudy and her friend Kim do the Electric Slide). Deon Richmond as Kenny.
Feb. 8, 1990, midnight
S6E19 - Mr. Sandman
Rudy is forced to take tap dancing lessons for a school project. Cliff is presented with a "challenge" he cannot resist. Guest appearances by Howard "Sandman" Sims and Elaine Stritch.
Feb. 15, 1990, midnight
S6E20 - Isn't It Romantic?
Cliff, Elvin and Martin secretly compete to determine who is the most romantic husband in the Huxtable family.
Feb. 22, 1990, midnight
S6E21 - Theo's Dirty Laundry
Cliff and Clair discover that Theo has moved in with Justine. Last Appearance Of Michelle Thomas as Justine. Victoria Rowell as Paula.
March 15, 1990, midnight
S6E22 - What's It All About?
Clair is burned out from work and family pressures and hurries off to the woods.
March 22, 1990, midnight
S6E23 - Off to See the Wretched
Vanessa and her friends sneak out of town to attend a concert in Baltimore, but encounter huge problems along the way. Afterwards, she must face the wrath of Cliff and an infuriated Clair.
April 5, 1990, midnight
S6E24 - The Moves
The Huxtables' nerdy neighbor (Wallace Shawn) reinvents himself after a divorce.
April 19, 1990, midnight
S6E25 - Live and Learn
Denise wants to become a teacher . . . without finishing college. Guest appearance by Max Roach.
April 26, 1990, midnight
S6E26 - The Storyteller
"Gram Tee", Cliff's 98 year old great aunt, comes to visit the family.
May 3, 1990, midnight