Naomi's closest friends join her to help uncover who or what's behind the unexpected event that has their small military town buzzing and left her with strange new fainting spells.

Naomi enlists her friends to dig deeper into the mystery surrounding unexplained occurrences in Port Oswego. Naomi's parents are caught off guard by Naomi's interrogations. Another ominous encounter with Zumbado leaves Naomi shaken.

Barry and Iris relive the same day over and over again. Joe has a heart-to-heart with Cecile. friends and foes, old and new, begin to descend upon Central City.

Barry feels guilty for what happened to Caitlin. Mark comes up with a plan that makes everyone skeptical. Red Death looms in Central City and commands that failure is not an option. Old friends pay an unexpected visit to S.T.A.R. Labs.

The Kents celebrate the boys' 16th birthday, and Lois gets some startling news.

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

Naomi gets guidance from Dee about harnessing her powers, while juggling everyday life as a teenager. Naomi's obsession with uncovering answers has her engaging in dangerous behavior, Zumbado seeks out the help of an old friend.

Naomi discovers more about her past, but must come to terms with the secrets that were kept from her. As Naomi continues her training, she finds the courage to confront Zumbado. Naomi faces competition for at school for class president.

Barry recruits an unlikely team of allies to steal a valuable piece of equipment before the new Rogues can.

Lois and Chrissy pursue a new lead in the Mannheim investigation against Clark's wishes. Jonathan, Jordan, and Nat attempt at a kind gesture is complicated by an unexpected obstacle. Lana, Sarah, and Kyle adjust to their own new normal.

Lois interrupts an intense conversation between Clark and John Henry. Kyle tries to run interference between Sarah and Lana. Jonathan has a heated discussion with Candice's dad.

With Naomi still shaken by her terrifying encounter with the bounty hunter, Dee continues training her on controlling her thoughts and emotions and, therefore, her powers. The class sets off on an exciting weeklong camping excursion.

The tension between Nathan and Anthony escalates when Anthony feels the Homecoming tradition is being disrespected by a military kid. Naomi discovers a potential new source of information. Zumbado has a run-in with Greg and Jennifer.

When Naomi faces dire circumstances, she is forced to seek help from Zumbado.

The Flash is forced to make an impossible choice; with the power out in the city, Team Flash calls upon the Rogue Squad to help. Iris is visited by an old friend. Joe and Cecile work on finding a balance.

Red Death unleashes her plan for total justice, with the aid of as-yet unseen ally.

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

Clark finds himself in uncharted territory. Lois bonds with a new friend. Superman pays Bruno Mannheim a surprise visit. Lana puts Sarah in charge while she's away at a meeting with Chrissy.

Naomi must take special care to protect her identity after Jacob shares obscure information with her and Annabelle. Greg and Jennifer celebrate their 20th Wedding Anniversary while also giving serious consideration to their future and how best to protect Naomi. Dee and Zumbado disagree on how Naomi should be trained for a larger, very imminent threat. Nathan and Anthony choose the comic bookstore for their class volunteer project, but Lourdes finds their presence to be more of an intrusion into her private life.

New information leads Naomi to believe there is another alien in her midst. A visit from Cmdr. Steel prompts Dee and Zumbado to make an unexpected visit to the McDuffy home in the middle of the anniversary party.

Barry and Iris prepare for their new life. Cecile takes on a case involving a string of unfortunate and highly unexpected events. Chester and the team work with Khione to figure out her abilities.

Iris and Nia fall into a fever dream and explore different possibilities for their lives. Barry, Chester, Allegra and Cecile desperately try to help them. Khione feels that Mark is trying to make her something she is not.

In the aftermath of Naomi discovering who Greg and Jen really are and that they've been lying about it her entire life, Naomi sets out on her own to dig deeper for the truth only to discover how many people have been keeping secrets from her.

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

A seemingly simple mold inspection at S.T.A.R. Labs leads to unexpected time anomalies. Chester admits a secret to Allegra, which makes things awkward between the two. Khione meets with an old friend of Team Flash.

Clark and Chrissy try to pique Lois' interest in investigating Bruno, while Jordan inadvertently threatens Jon's standing with the fire department.

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

Naomi and Annabelle are looking forward to a perfect prom night with Nathan, Jacob and their entire junior class but things rarely go as planned for a teenage superhero.

Lois interviews Peia in the hope of unearthing the truth about an old case. Clark struggles to spend quality time with the boys. Jonathan and Jordan find themselves at a party where tensions between Sarah and Jordan come to a head.

Team Flash throws a surprise birthday party for Barry, but things go terribly awry when Ramsey Rosso crashes the festivities.

After having visions from her brief time on Earth-29, Naomi seeks the advice of her protectors. Naomi receives a special gift from Akira and sets off on a road trip with Annabelle to search for a specific place from a new vision.

Naomi must make a decision to protect those she loves most, but in the end, Naomi needs those closest to her to battle a powerful being that has been hunting her since birth.

While Lois undergoes lifesaving surgery, Peia's powers run out of control.

Lois and Clark clash with Jordan over his carelessness around using his powers in public. And finally, after seventeen years behind bars, Lex Luthor is set to be released from prison.

All of Smallville comes together to view a meteor shower. Lex Luthor makes his move.

As Iris receives word of a career milestone, Barry is suddenly nowhere to be found. Barry runs across many familiar faces. Khione continues to figure out her powers. Chester works on a suit for Allegra.

Iris is alarmed by Barry's disappearance and Cecile assures her everything will be OK. Team Flash is affected by a mysterious substance. Khione develops a better understanding of what she can and cannot control.

Team Flash works together to figure out how to protect Barry, all while being very careful who they trust. Cecile is skeptical of the plan after an unsuccessful attempt. Khione's confidence in Chester enables him to convince Cecile to try again.

The Flash, the fastest man alive, is tasked with his greatest challenge yet to save the timeline and save existence. Friends old and new gather for an epic battle to save Central City, one last time.