Superman and Lois' return to idyllic Smallville is set to be upended by mysterious strangers.

While adjusting to their new lives in Smallville, Lois and Clark make an important decision concerning one of their sons. Meanwhile, tensions begin to rise between Lois and Morgan Edge. Lastly, Lana Lang Cushing invites the Kent family over for a barbecue.

Clark shares some of his Kryptonian history with Jordan and Jonathan during a family breakfast. Meanwhile, Lois and Chrissy dig deeper to uncover the truth about Morgan Edge.

While sitting in the stands at the high school football game, Lois and Chrissy spot fish out of water Morgan Edge conversing with Mayor Dean and Kyle Kushing, and the two see right through this insincere move to try to win over the town. Meanwhile, Clark agrees to help Lois out at a town hall meeting, but things get tense when he finds himself pulled in two different directions. Lastly, Jonathan is having mixed emotions about Jordan's newfound status.

As Smallville celebrates its first Harvest Festival since Martha’s passing, Clark is reminded what his mother meant to him and learns a lesson that will help him move past her death. Meanwhile, Lois makes a breakthrough in the investigation of Morgan Edge. Lastly, Kyle tries to reconnect with Lana, but it seems like he might be falling back into his old ways.

Clark reconsiders his decision to let Jordan play football. Meanwhile, Lois' continued investigation of Morgan Edge requires her to trust an unexpected ally.

Clark struggles to help Jordan who is grappling with a new power. Meanwhile, Lois enlists Clark's help which leads to a surprise encounter.

Clark encourages Lois to reach out for help after noticing her reaching a breaking point. Meanwhile, Jonathan finds himself in a dangerous situation. Lastly, Kyle encourages Sarah to audition for the musical revue at school.

Chrissy and Clark team up to piece together the significance of Smallville to Morgan Edge.

Lana reaches out to Lois and Clark when Kyle starts behaving strangely. Meanwhile, Jonathan opens up to Jordan. Lastly, Sarah storms out after accusing her mom of always covering for her dad.

Clark makes a startling discovery about Morgan Edge.

Lois and John Henry Irons can't seem to agree on the best way to stop Morgan Edge. Meanwhile, Jonathan encourages Jordan to focus on strengthening his powers to help locate their dad. Lastly, an old friend is brought in to help with the search.

Superman pays a visit to Morgan Edge. Meanwhile, Lois and Chrissy work together on a story. Lastly, Jonathan finds a welcome distraction during a very stressful school day.

Lois is worried about Jordan as he and Sarah continue to grow closer. Meanwhile, Clark pays Lana a visit. Lastly, Jonathan has been spending more and more time with John Henry.

Superman's worst nightmare comes to life and Lois confronts Leslie Larr. Meanwhile, Lana, Kyle and Sarah agree to stay to help General Lane.

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.