In the tenth-season premiere, "The Ring Cycle," he reappears with yet a different fiancée, a woman named Bridgett, at Daphne's courtroom wedding with Niles. Donny thanks Daphne, stating that she played a major role in his eventual happiness, as if she had not left him at the altar, he would not have met his ex-wife, who introduced him to his new bride-to-be.
In the tenth-season premiere of "Frasier," Donny reappears with a new fiancée named Bridgett at Daphne's wedding to Niles. He thanks Daphne for her role in his happiness, suggesting that he wouldn't have met his current wife if she hadn't left him at the altar.