Lois & Clark: The New Adventures of Superman (1993)

S3E6 Don't Tug on Superman's Cape

Lois and Clark choose to put the idea of “marriage” on hold for now. Meanwhile, a wealthy couple in Metropolis devises a scheme to ensnare Superman and add him to their assortment of valuables. To lure him in, they kidnap Lois. While she’s trapped, Lois and Clark engage in a heartfelt discussion that helps them confront their anxieties about committing to marriage.