7x57 The Wedding of Lady Elaine? (6)
First Aired: May. 07, 1974 on PBS
Summary: Mr. Rogers is visited by a professor, who talks to him about some ancient musical artifacts. Meanwhile, in the Neighborhood of Make-Believe, Corny leaves the kingdom on business, though it only causes Lady Elaine Fairchilde to strengthen her conviction in believing Corny wishes to marry her.