第 7 季 共 20 集
播出时间:2007年9月28日
第 1 集 Bizarro
播出时间:2007年9月28日
During Clark's battle with the last Phantom Zone wraith, Lex is rescued by a mysterious woman. She then goes to the Kent farm and reveals she is Clark's cousin, Kara, from Krypton.
第 2 集 Kara
播出时间:2007年10月5日
Clark and Lois meet Smallville's newest arrival face-to-face, and she has some surprising news. Clark decides to leave Smallville and continue with his superhero training but Jor-el informs him that a new Kryptonian menace has arisen.
第 3 集 Fierce
播出时间:2007年10月12日
Kara takes to life in Smallville by getting a job at the Talon, and entering the Miss Sweet Corn Pageant as a contestant, overruling Clark's objections. However, Lex takes an interest in her and three of the other contestants discover she has super-powers and decide to use her to steal a valuable time capsule.
第 4 集 Cure
播出时间:2007年10月19日
Dr. Curtis Knox says he can "cure" someone from being a "meteor freak," changing their lives. Chloe takes an interest in this, but Dr. Knox may have another secret.
第 5 集 Action
播出时间:2007年10月26日
When a movie is shot in Smallville, Clark is forced to secretly use his powers to save someone from a runaway car... but somebody is looking and becomes Clark's biggest fan. Meanwhile, Lionel's fate is revealed.
第 6 集 Lara
播出时间:2007年11月2日
Kara goes to Washington to look for her missing crystal, but is captured after she breaks into the lab. She's sedated with a truth serum that has kryptonite in it, which makes her relive a trip to Earth from the past. In this past trip she followed Lara, Clark's biological mother, to the Kent's farm. Clark saves Kara, but also ends up being affected by the serum when he burns it with his heat vision.
第 7 集 Wrath
播出时间:2007年11月9日
Lana absorbs Clark's powers during a lightning storm, which she uses to break into Lex's safe and steal some incriminating evidence. After being turned away by Grant at the Daily Planet, who won't accept her stolen evidence, Lana goes after Lex herself. Clark tries to rescue Lex, but must first battle the super-powered Lana.
第 8 集 Blue
播出时间:2007年11月16日
Clark hears his mother's voice trapped in Kara's crystal, and releases her. She gives him Jor-El's ring made of Blue Kryptonite, which strips him of his powers.
第 9 集 Gemini
播出时间:2007年12月14日
A mysterious man who claims to be a product of Lex's latest project plants a bomb on Chloe and uses her to force Lois to get the truth from Lex.
第 10 集 Persona
播出时间:2008年2月1日
Chloe begins to notice that Clark's not acting like himself. Bizarro enlists the help of Brainiac.
第 11 集 Siren
播出时间:2008年2月8日
When Green Arrow's band of heroes thwarts his efforts once too often, Lex employs a super-powered vigilante to take down the Emerald Archer.
第 12 集 Fracture
播出时间:2008年2月15日
Lex tracks the amnesiac Kara to Detroit, where Lois follows him. An obsessive busboy infatuated with Kara shoots Lex, and Chloe has to determine whether to heal him or not.
第 13 集 Hero
播出时间:2008年3月14日
Pete Ross returns to town and finds a number of surprising changes since his departure. Besides resolving his feelings toward Clark since he learned of his friend's secret, Pete has to deal with the acquisition of a superpower of his own.
第 14 集 Traveler
播出时间:2008年3月21日
Lionel has Clark kidnapped, and when Chloe and Lana confront him, he makes them think Lex is the culprit. Chloe and Lana then beg Jor-El to restore Kara's memory because she's the only person who can rescue Clark.
第 15 集 Veritas
播出时间:2008年3月28日
Clark must learn a new superpower as he and Kara join forces to take on Brainiac, putting the lives of their friends in danger.
第 16 集 Descent
播出时间:2008年4月18日
No one is safe when Lex seeks the secret of Veritas, and Clark tries to stop him.
第 17 集 Sleeper
播出时间:2008年4月25日
While Clark seeks out Brainiac to force him to fulfill his side of their bargain and restore Lana, Chloe and Jimmy go up against the government.
第 18 集 Apocalypse
播出时间:2008年5月2日
When Clark wonders if the world would be better off if he never came to Smallville, Jor-El shows him what life would have been like if he had never existed.
第 19 集 Quest
播出时间:2008年5月9日
After Lex is attacked by a mysterious stranger, he and Clark both discover the last surviving member of the Veritas group who holds the secret to controlling the Traveler.
第 20 集 Arctic
播出时间:2008年5月16日
Lex is taken to the Fortress to fulfill his destiny, while Lana awakens from her coma and Chloe is arrested by the government.