The New Adventures of Superman - Season 3 (1968)

Lois meets a man named Vamore who is known to be a friend of the escaped criminal Professor Dujy. As Lois follows Vamore to a remote island, Superman must protect Metropolis from a wave of dangerous iron spheres that threaten to destroy the city.

While Clark and Lois are at Perry's farm for the annual Daily Planet picnic, a mysterious mist entity comes up from a well. The entity can create the appearance of being human from inhabiting clothing. It attacks Lois, but Superman saves her. Unfortunately, however it pursues Lois to Metropolis and repeatedly tries kidnapping her, so that she can become the queen of its subterranean kingdom. After Superman confronts it in the Superman museum as Superboy, Superman manages to capture it, and seals up the well.

Lex Luthor beams two Luminians-creatures made of pure laser light- to earth, and sets them to work destroying everything they touch. When Superman proves invulnerable to their touch, Luthor arms himself with kryptonite. The Luminians decide Superman is not worth the trouble and turn on Luthor. Superman saves Luthor and together they devise a strategy to send the Luminians back to their own world forever.

In Scotland, while Clark Kent stays the night in an inn, Lois and Jimmy go to haunted Kilbane Castle. Two twins at the castle try scaring them away, fearing they'll discover their clan stole the castle from another clan. Their scare tactics cause a ghost from the other clan to be released. Superman manages to save Lois and Jimmy, arrest the twins, and assure the ghost that his clan will regain the castle.

In Japan, Clark and Jimmy are covering an industrialist who is being hounded by a saboteur. When Jimmy gets a Black Pearl after Superman rescues a pearl diver, the saboteur summons a mystic Sandman figure who can blow sand causing magical sleep to help with his sabotage. Superman must fight off the Sandman's sleeping sand and save Jimmy from a deathtrap, before capturing the saboteur and defeating the Sandman.