Clair goes on a local TV "issues" program and Cliff deals with the loss of his couch.
A definite example of two plotlines that aren't well-developed, don't connect, and are rather indicative of a successful series that is "mailing it in" in many ways.
The idea of the intellectual Clair being a guest on a local talk show is good, but it is lost when her fellow voices are unidimensional and her own sources are "pop" (Galbraith's "The Great Crash" is an academic source? Please.). At the same time, Cosby is assigned to improv duty when it appears that Clair wants to ship his couch to his daughter's new home. He rarely is as funny in these moments as he manages in his recorded acts, but the formula is already so hardened by this time, and so popular with audiences, that the series always lets it go.
The series was different and unique for a couple of years, by the time of this episode it was chained to disconnected stories and just-clever-enough teleplays. In a lot of ways, the writers are probably most to blame (often, funny scenes are written, but not stories), though I sometimes think that Bill Cosby or his scores of consultants should have seen it. But on the other hand, the ratings were still strong.