第 3 季 共 26 集
播出时间：1990年10月7日
第 1 集 The Bride of Bizarro (1)
播出时间：1990年10月7日
As Clark and Lana begin their internship at the Bureau for Extra-Normal Matters, Bizarro returns from deep space to announce on a talk show that he wants a mate! Lex Luthor makes a deal with Bizarro to create him a mate created by the duplicating machine that made Bizarro on the condition that he steal a supply of kryptonite to power it, and to kill Superboy.
第 2 集 The Bride of Bizarro (2)
播出时间：1990年10月14日
After Luthor threatens to create explosive Bizarro duplicates of everyone in the city if Superboy doesn't appear at his lair by midnight, Bizarro once again agrees to kill Superboy in exchange for a Bizarro-bride. When Luthor creates a Bizarro duplicate of Lana Lang, Bizarro is prepared to uphold his end of the bargain, and this time Superboy may not be able to escape.
第 3 集 The Lair
播出时间：1990年10月21日
Clark, Lana, and Matt investigate sightings of a creature that was deformed as a result of contaminated water. The creature turns out to be a man that formerly worked for Pat Kenderson (from season 1's Troubled Waters), and is being hunted by his men.
第 4 集 Neila
播出时间：1990年10月28日
A superhuman female warrior comes from another world in search of Superboy, testing him for his worthiness to be her husband. She causes destruction in the process, ignoring Superboy's effort to show what it means to care for others.
第 5 集 Roads Not Taken (1)
播出时间：1990年11月4日
Luthor steps into an interdimensional portal created by a Dr. Winger and is whisked away to an alternate earth. Darla kidnaps Lana in order to lure Superboy to the lab where Luthor vanished. She tells Superboy that if he doesn't go through the portal to save Lex, Lana will die. Naturally, he goes through and is transported to an alternate earth where his alternate self killed Luthor's alternate years ago. Now the world is in chaos. Lana is homeless, everyone hates Superboy, and ""our"" Luthor, claiming to be that world's Luthor resurrected, is quickly taking over. Superboy finds Luthor, but is held at bay by kryptonite. He travels to the Bureau for extra-normal Matters and there encounters his other self, a Superboy who wears leather and dark glasses and just doesn't care anymore. He explains how he killed Luthor in a fit of rage by cutting him in two with heat vision. After the discussion is over, the Superboy of earth-1 heads to Dr. Winger's lab looking for a way back home.
第 6 集 Roads Not Taken (2)
播出时间：1990年11月11日
Superboy jumps through the portal to escape the kryptonite assault. This time he ends up on a world where his alternate self has taken the name ""Sovereign"" and is the dictator of earth, ruling his people with fear. Superboy encounters the Lana of this world, who is fighting, along with her lover Lex Luthor, to take down the Sovereign. Superboy joins the resistance. Meanwhile, the Sovereign learns of the ""imposter"" who has all of his powers. He sends troops to attack the resistance fighters, and in the assault Luthor is killed. Superboy vows to stop the Sovereign. He manages to get into the Sovereign's headquarters and confronts his alternate face to face. They struggle briefly before Lana arrives with a chunk of kryptonite and a bomb strapped to her body.
第 7 集 The Sons of Icarus
播出时间：1990年11月18日
After a number of flying men are spotted over Capitol City, Matt Ritter learns that the men are part of a group called the "Katia," descendants of African slaves who gained the power to fly. When Matt discovers he is one of them, he quits his job at the Bureau and joins the group. But Clark and Lana find out that there is a connection between the Katia and a series of fires that have broken out throughout the city, and if the Katia aren't stopped, Capitol City could burn to the ground.
第 8 集 Carnival
播出时间：1990年11月25日
A carnival arrives into town, and its owner, a man named DeVille, steals the souls of some of the carnival-goers, and targets Superboy to break his moral spirit and steal his soul as well.
第 9 集 Test of Time
播出时间：1990年12月2日
Two aliens from another world have come to Earth, and alter time, accelerating Superboy's presence. They test him, observing his reactions and using the results to determine if the entire human race on Earth can be conquered so they'll know how to take over the world and re-establish their race.
第 10 集 Mindscape
播出时间：1990年12月9日
When Superboy investigates a rock that was brought into the Bureau, an alien life form jumps out and attaches itself to him, causing him to go unconscious. The alien produces dreams that exploits Superboy's worst fears, and it feeds of the adrenaline the dreams create. With no one able to stop the alien, it might drain Superboy of life.
第 11 集 Superboy... Lost
播出时间：1990年12月16日
When Superboy tries to intercept a meteor that is approaching Earth, he is injured, resulting in amnesia. In the forest, a mother and son find him and nurse him back to health, while he rediscovers who he truly is. All the while, the mother and son are in hiding, trying to avoid death, courtesy of the boy's father.
第 12 集 Special Effects
播出时间：1991年1月6日
While Clark and Lana investigate a murder by a group of monsters at a production studio, they run into Andy McAlister. Together, they find that a fellow director is actually responsible, and is blackmailing the monsters to commit the murders.
第 13 集 Neila and the Beast
播出时间：1991年1月13日
Neila returns to Earth after her race of warriors are destroyed, and summons Superboy to aid her in destroying a creature that is out to kill her. She also gives humans a chance, and asks for Lana's help in finding companionship.
第 14 集 The Golem
播出时间：1991年1月20日
When an elderly Jewish man is being harassed by some neo-nazis, he creates a Golem, a creature from folklore. He instructs him to defend him from the neo-nazis but it loses control and is out to kill all neo-nazis.
第 15 集 A Day in the Double Life
播出时间：1991年1月27日
Clark chronicles his daily activities for Jackson, rewording his outings as Superboy to cover up his identity. This leads to the conclusion that he leads a rather boring life.
第 16 集 Bodyswap
播出时间：1991年2月23日
Superboy saves a vacationing family from disaster as their car heads toward collision with a tree. He then proceeds to steal their car. Needless to say, Superboy is not quite himself. Later, Luthor confronts Lana in a parking building. He claims that he is not really Luthor, but Superboy. He explains that a scientist named Deland lured him to a lab promising information about his past, but instead of that, he found his mind transferred to Luthor's body. Lana doesn't believe him, and escapes ""Luthor"". That night, ""Superboy"" arrives at Lana's apartment wanting to take their relationship to a deeper level. Back at Deland's lab, the real Superboy is captured by Luthor and taken to prison so he can take Luthor's place in the electric chair. Lana breaks him free, and explains she knew the real Superboy would never come on to her like that. The two hatch a plan to get Luthor back in his rightful body.
第 17 集 Rebirth (1)
播出时间：1991年2月10日
Superboy tries to stop a guerilla-style gang, and is then framed for the death of its leader, which was really caused by a member of the gang. Fearing that he did cause the man's death, Superboy retreats to Smallville, where he vows to never use his powers again.
第 18 集 Rebirth (2)
播出时间：1991年2月27日
While the gang plans to steal and sell chemical weapons on the black market, Lana sets out to clear Superboy's name, so he can be vindicated of the man's murder.
第 19 集 Werewolf
播出时间：1991年2月24日
Clark and company try to help a young woman, who has led them on a goose chase looking for a werewolf that she'd spotted. Meanwhile, she has a secret of her own.
第 20 集 People vs. Metallo
播出时间：1991年4月7日
Court is in session for the trial of Metallo, but he turns the tables when kryptonite is smuggled into the courtroom, giving him strength to overtake it, and Superboy. He puts Superboy on trial while on the stand, subdued by the green rock, and it will take the teamwork of everyone in the room to bring Metallo down.
第 21 集 Jackson and Hyde
播出时间：1991年4月21日
Jackson takes an elixir that makes him stronger, and transforms his behavior. As a result, he is now being blamed for the beating deaths of two people. Little does anyone know, there's a second person who's also taking the elixir.
第 22 集 Mine Games
播出时间：1991年4月22日
After a botched attempt to rescue Lana from Luthor, Superboy and Luthor end up trapped in a lead coated mine with a chunk of kryptonite, and they are forced to put aside their differences to find a way out.
第 23 集 Wish for Armageddon
播出时间：1991年5月5日
Superboy has dreams about being involved in provoking the Russians into warfare, and finds that they are actually real when he sees reports about it on the news. It turns out that Superboy was tricked into signing a contract that places him under the control of a immortal man that is trying to bring about Armaggedon, so he'll be released from a lifelong curse.
第 24 集 Standoff
播出时间：1991年5月12日
Clark, his friends, and innocent bystanders are holed up in a building as hostages, and Clark must find a way to rescue them without revealing his identity.
第 25 集 The Road to Hell (1)
播出时间：1991年5月19日
Superboy is taken to an alternate world where he as a child is living in the jungle and must be saved from being captured. A run-in with an alternate Lex Luthor creates complications.
第 26 集 The Road to Hell (2)
播出时间：1991年5月26日
After Superboy's near death run-in with Luthor, he is taken to yet another universe, one of which an alternate Dr. Winger, Luthor, who is now a doctor, and Superman exist. Dr. Winger admits that he's repsonsible for Superboy's latest (and dangerous) adventure, and they help him recover. Superboy has to convince his older alternate to allow him to go to the previous universe to save the younger version of himself, so that their paths in all worlds are corrected.
