Season 8: Episode 153: The Yada YadaWhen dentist Tim Whatley changes religions, Jerry suspects it's only so he can tell Jewish jokes with a clear conscience. And while George's girlfriend has him intrigued by her frequent use of the phrase "yada yada," Elaine is asked to vouch for the Lookners in their effort to adopt a child. Although intending to make Beth and her husband look good, Elaine's reference to Arnie's temper jeopardizes the adoption. Meanwhile, after Kramer and Mickey arrange a double date with two women, they cannot decide who gets which one.
When Marcy's "yada yada" obscures the fact that she slept with a former boyfriend, George presses for details and discovers there's a lot about her that he doesn't want to know. Turning to Tim's former priest for help, Jerry tells a joke that causes everyone to think he's biased against dentists. Meanwhile, as Elaine realizes that she cost Arnie and Beth their adoption and sets out to correct the mistake, Kramer changes his mind about Karen after meeting her parents.
While Beth suspects Arnie and Elaine of having an affair, Mickey announces that he and Karen are getting married. As Elaine aggressively lobbies to get the Lookners a child, she learns that Jerry is already planning to woo Beth following her divorce. But when George and Marcy's shopping trip ends with her being jailed, word that Mickey's dad is a dentist exposes Beth's own prejudices. Finally, it's only after she's married that Kramer learns Karen liked him best.