Lois agrees to marry Luthor, unaware he has imprisoned Superman in a cell made of kryptonite.

Clark may lose his position and his partner when Lex Luthor takes over both the Daily Planet newspaper and Lois' affections.

Clark's true identity is in jeopardy when he is forced to save friends who are taken hostage when terrorists invade the Daily Planet.

Clark senses a kindred spirit when he is confronted by a new enemy: a Superman clone determined to destroy the man of steel.

Lois is overcome by jealousy when her college rival publishes several top news stories and also expresses a romantic interest in Clark.

As Clark begins to discover more about his mysterious past, Lex Luthor also learns more about Superman's true identity.

Clark is skeptical as a sympathetic Lois harbors a fugitive and they search for an antidote to a world-threatening computer virus.

Lois and Clark work to uncover the truth behind some strange disappearances that lead to mystery, magic, and a possible murder.

Lois' life is in danger when she witnesses the murder of a scientist who was claiming to know the secret to increased male potency. Now, Clark and Perry need to protect her from the murderer, Mr Make-up, and from the scientist's affair from the past.

Superman's encounter with an asteroid headed for Earth results in amnesia for Clark, who forgets how to use his powers.

Lois and Clark cannot ignore their growing attraction to each other while posing as newlyweds during a surveillance operation.

A powerful perfume leads Lois to unleash her hidden feelings for Clark, who isn't too pleased with the situation.

Superman winds up in jail after authorities decide he is responsible for a freak winter heat wave. 

A friend of Jonathan and Martha has found a strange meteorite, Jason Trask is back and now he is in Smallville, looking for this meteorite that can destroy Superman, and Lois and Clark go to Smallville to investigate the story and Clark introduces her to his parents.

Juvenile delinquents playing high-tech pranks are hooked on a dangerous drug that boosts intelligence.

Lois' undercover persona, a nightclub singer, arouses unexpected interest. Plus, can Superman halt the activities of a group of arsonists?

Lois and Clark investigate some strangely powerful boxers - and Lois is surprised to discover the man behind their secret is her estranged father.

An invisible man terrorizes Metropolis, staging violent robberies and helping vicious criminals escape. 

Luthor engages Superman in tests that make him confront the limitations of his powers.

A renegade government agent targets Clark and Lois in an attempt to capture Superman.

Clark's parents devise a superhero persona so he can investigate Luthor's connection to the sabotage of a space shuttle.