What was the name of the episode where Kevin's sister Karen gets married?

The episode where Kevin’s sister Karen gets married is “The Wedding.” It is the 22nd episode of The Wonder Years’ fifth season and centers on Karen Arnold’s marriage to Michael, played by David Schwimmer.

Karen and Michael choose a small outdoor ceremony rather than the traditional church wedding that Karen’s mother, Norma, imagines. The family also learns that the couple plans to move to Alaska, adding an emotional farewell to the wedding storyline. Kevin becomes caught between his sister’s wishes and his parents’ concerns.

“The Wedding” originally aired on ABC on April 29, 1992. It is sometimes confused with “Stormy Weather,” the preceding episode, which deals with Karen and Michael’s argument and reconciliation, or “Scenes from a Wedding,” a later episode involving another couple’s ceremony. Those episodes feature wedding-related plots, but “The Wedding” is the canonical title for Karen’s marriage episode.