S3·E10 The Mysterious Mr. Mist (2)
Aired October 12, 1968
Synopsis
Superman saves Lois from the mysterious must. Unfortunately, it follows Lois back to Metropolis and tries to kidnap her. It wants Lois to be the queen of an underground kingdom. Eventually, the mist gets into the Superman museum and pretends to be Superboy. Superman captures the mist and seals it in the bottom of a very deep well.