Lois' undercover assignment reveals a deadly foe that promises to change the Kent family forever. Meanwhile, the Kent boys find themselves being pulled in opposite directions.

Clark and Chrissy both notice a small crack in Lois' game face. Sarah and Jordan have an awkward encounter, and Lana receives a panicked phone call.

Lois and Chrissy pursue a new lead in the Mannheim investigation against Clark's wishes. Meanwhile, Jonathan, Jordan, and Nat face an unexpected obstacle.

Lois interrupts an intense conversation between Clark and John Henry. Meanwhile, Jonathan has a heated discussion with Candice's dad.

Clark and General Lane are both having a hard time giving Lois room to make her own decisions. Meanwhile, Lana and Sarah have a run-in with an old friend at the diner.

Clark finds himself in uncharted territory, and Lois bonds with a new friend. Meanwhile, Superman pays Bruno Mannheim a surprise visit.

Lois and Clark dig deeper on Bruno Mannheim, starting with his connections to Hob's Bay Medical Center, while Jonathan and Jordan panic at home over Lois' dire diagnosis.

After learning about Bruno and Peia, Clark works to reignite Lois' interest in taking Bruno down; elsewhere, Natalie meets Matteo's parents, with disastrous consequences.

Superman and John Henry clash over how to handle Bruno Mannheim, while Lois worries over upcoming treatments and confides in Lana about her early courtship with Clark.

Lois attempts to interview Peia in the hopes of unearthing the truth about an old case, while Clark struggles to spend quality time with the boys.

Clark helps Lois prepare for a procedure but must leave the boys with her to help John Henry and General Lane track down the Mannheims.

Finally, after seventeen years behind bars, Lex Luthor is set to be released from prison. Lois and Clark clash with Jordan over his carelessness around using his powers in public, while Jonathan struggles with Kyle's change in behavior at the firehouse.

All of Smallville comes together to view a meteor shower, and Lex Luthor makes his move to take down Superman and Lois.

超人与卢瑟的怪物展开了一场残酷的战斗；露易斯和孩子们争分夺秒地拯救莱恩将军。

拉娜和莎拉加入了对抗卢瑟的战斗，卢瑟开始在小镇有所行动；乔丹和乔纳森在一个重要决定上发生了争执。

乔丹从失败中挣扎出来，开始陷入漩涡；乔纳森发现了新的能力；莱恩将军招募了约翰-亨利和娜塔莉-艾恩斯，然后做出了一个将改变一切的选择。

肯特一家努力适应新生活；露易丝帮助凯尔和克里斯举办了一场临时婚礼，但婚礼并没有按计划进行。

露易丝在试图阻止卢瑟的过程中做出了越来越大胆的举动。乔纳森努力平衡自己的个人生活和责任，而克拉克则了解到一个令人不安的真相。

卢瑟计划将他的公司迁至斯莫维尔，但遭到拉娜的反对；萨拉面临一个艰难的决定；克拉克与卢瑟进行面对面的对抗。

卢瑟向露易丝发起了一场现场直播辩论的挑战，但事情并非看上去那样简单；约翰·亨利和克拉克面临一个令人不安的可能性。

露易丝在辩论的后果中挣扎；克拉克利用卢瑟的战术反击他，而乔纳森和乔丹则为即将到来的战斗做好准备。

肯特一家全力以赴地迎战，卢瑟在小镇做出他的最后一击。