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

S3E15 I Now Pronounce You...

As Lois and Clark prepare for their wedding, they stumble upon a bizarre case involving the theft of rare amphibians. Their investigation brings them face-to-face with an eccentric biologist who is entangled in a sinister scheme to assassinate the President. With time running out, the couple must navigate both their impending nuptials and the dangerous plot that threatens national security.