第 4 季 共 22 集
播出时间：1991年10月7日
第 1 集 A Change of Heart (1)
播出时间：1991年10月7日
Superboy investigates a wave of violence, however he himself is accused of murder.
第 2 集 A Change of Heart (2)
播出时间：1991年10月14日
Adam threatens to kill Lana unless Tommy helps him develop a weapon to kill Superboy.
第 3 集 The Kryptonite Kid
播出时间：1991年10月21日
A young scientist, who has been infected with kryptonite during a lab explosion, plans to use his powers to harm Superboy.
第 4 集 The Basement
播出时间：1991年10月28日
Lana goes to investigate reports of a ghost in a family's basement. What she finds is a little girl. But this is no ordinary little girl. She quickly slaps a device on Lana's neck and through it and an identical device on her own neck, she transforms herself into an exact duplicate of Lana. She reveals that she is an alien from a world where the beings have no identities of their own. They take the identities of others to survive. The alien has Lana's physical appearance, but not her memories. So she activates the device once again to transfer Lana's knowledge and memories to herself. The device malfunctions, however, and the connection is broken before the alien can absorb all of Lana's memories. She does catch a glimpse of Superboy, however, and wants to get closer to him so she can take his identity and his powers. The alien heads to the Bureau and convinces everyone there that she is really Lana. She then returns to the basement to finish Lana off.
第 5 集 Darla Goes Ballistic
播出时间：1991年11月4日
Darla drinks an experimental formula which gives her strange and erratic powers.
第 6 集 Paranoia
播出时间：1991年11月11日
Paranoia strangles Capital City as residents become fearful of a race of invisible aliens who have just landed.
第 7 集 Know Thine Enemy (1)
播出时间：1991年11月18日
Lex Luthor has plans to bring about the end of the world by detonating a network of ""dirty bombs"" that will wipe out the population with a cloud of radiation. And he has a plan to get Superboy out of the way as well. Superboy is drawn to an old lair of Luthor's by a hypersonic signal. There he finds Lana has followed him and they discover a computer program, created by Luthor, known as a ""psycho-disc"". The program allows the user to live out Luthor's life in a virtual reality type environment. Superboy activates the program and becomes Luthor in the VR world. He sees how Luthor lived with an abusive father, and a mother who refused to stand up for herself. The only person Luthor ever loved was his sister Lena. Meanwhile, back in the real world, Lana learns that if Superboy is not removed from the VR world soon, he will be trapped in a never ending loop of Luthor's memories. Lana becomes a part of the program herself, hoping to rescue Superboy.
第 8 集 Know Thine Enemy (2)
播出时间：1991年11月25日
Lana appears in Luthor's VR world just as Superboy, believing he is Luthor, is about the kill ""his"" parents with a bomb. She convinces Superboy that he is not Luthor and none of what is happening is real. As soon as he acknowledges this, the program shuts down. Back at Luthor's lair, Darla now sees how truly crazy Lex is, and shoots him in the shoulder. She activates a hypersonic signal and Superboy follows it to the new lair. Meanwhile, Lana learns that Luthor's sudden death wish came about because his beloved Lena died in a car crash one week ago. However, he utilities were turned off the day before she died, and no body was ever found. Lana goes in search of Lena, who she believes is still alive somewhere. Luthor unleashes his android double to kill Superboy. The two fight as the countdown to destruction continues. Minutes before the bombs are to go off, Lana arrives with now 23-year-old Lena.
第 9 集 Hell Breaks Loose
播出时间：1991年12月2日
Strange things begin to happen at the Bureau after a construction project begins. Tools are found twisted and mangled, computers print countless sheets filled with the name "Lisa," and strange noises are heard. While working one night, Lana is nearly blown out of the window by a gust of wind coming from inside the building. She calls in a paranormal specialist and a psychic to investigate and they discover a gun hidden in a retaining wall that is not part of the building plans.
第 10 集 Into the Mystery
播出时间：1991年12月9日
While trying to save the life of a man whose car just crashed, Superboy encounters an unusual ghostly woman. After the encounter, Clark begins to reminisce about his aunt Cassandra and everything that she taught him as a kid but his reminiscing is cut short as he has to save the life of a young boy, and once again he encounters the ghostly woman. After a third encounter at a fire in a nursing home, Superboy begins to search for Cassandra and locates her in a cabin outside the city.
第 11 集 To Be Human (1)
播出时间：1992年1月20日
After a year of ""normal"" life, Bizarro Lana explodes one afternoon leaving Bizarro devastated. Superboy finds Bizarro mourning Bizarro Lana and offers him hope...hope of being made into a normal human being. Superboy takes Bizarro to Dr. Lynn, who has developed a process that can use Superboy's brainwaves to correct Bizarro's imperfect mind. The transfer works, but soemthing causes the machines to overload. Superboy is left disoriented and weak. Meanwhile, Chaos, an insane terrorist is bombing parts of the city and wreaking havoc. Chaos is spotted by Superboy driving down a Capitol City street shooting at random pedestrians. As Superboy flies over, Chaos fires at him, and in his weakened state, Superboy is injured by the blast and falls to the street. Chaos drags Superboy away to dispose of him once and for all.
第 12 集 To Be Human (2)
播出时间：1992年1月27日
Bizarro now has a normal human appearance and is calling himself Bill Zarro. He has no super-powers in this form. He is working with Dr. Lynn to improve his mental skills when Chaos interrupts a TV broadcast. He announces that he has Superboy and will throw him off the highest building in Capitol City at midnight. Dr. Lynn recognizes Chaos. She says he was once a brilliant scientist, but a laboratory accident left him disfigured and now he blames the world for his problems. Bill Zarro now has to make a choice. He can be reverted back to the way he was before the process was performed. He can become ""Bizarro"" again, but the process cannot be reversed again once this is done.
第 13 集 West of Alpha Centauri
播出时间：1992年2月3日
Superboy is kidnapped and taken aboard a spaceship whose destination is a paradise planet just west of Alpha Centauri. Inside the ship, he finds most of the occupants are prisoners of a deranged captain, and they all believe Superboy is their savior from an old prophecy.
第 14 集 Threesome (1)
播出时间：1992年2月10日
Luthor and Metallo are broken out of prison by Odessa Vexman, the prison psychiatrist, and the three join forces to finally get rid of the source of their mutual frustration: Superboy.
第 15 集 Threesome (2)
播出时间：1992年2月17日
After nearly being destroyed by the trio, Superboy has to come up with a plan to round them up before more destruction ensues.
第 16 集 Out of Luck
播出时间：1992年2月24日
A rare coin seems to bless a criminal with good luck, while cursing Superboy's ability to capture him.
第 17 集 Who is Superboy?
播出时间：1992年3月2日
An intelligent computer that can retrace events on a given incident arrives at the Bureau, and Lana uses it to discover who Superboy is. All clues seem to point to Clark.
第 18 集 Cat and Mouse
播出时间：1992年4月20日
Superboy gets entagled in a dangerous game of "Cat And Mouse."
第 19 集 Obituary for a Super Hero
播出时间：1992年4月27日
The TV news show "Nighttime" covers the breaking news of Superboy's apparent death involving a yacht, a distress call, and a kryptonite bomb. Friends and enemies are interviewed while a Coast Guard vessel attempts to locate the body...if there is one.
第 20 集 Metamorphosis
播出时间：1992年5月4日
A gym owner is using the blood of his younger customers, along with a gold derivative, to keep himself young. This results in an acceleration in the victims' aging process. Lana also falls prey to the man.
第 21 集 Rites of Passage (1)
播出时间：1992年5月11日
Jackson investigates a phenomena which causes Superboy to lose control of his powers.
第 22 集 Rites of Passage (2)
播出时间：1992年5月18日
Before his powers are lost forever, Clark tries to get the crystal and complete the "Rites of Passage".
