Liz Ortecho reluctantly returns to her tourist-trap hometown of Roswell, N.M., and reconnects with Max Evans, her teenage crush who is now a Roswell police officer. But Liz soon discovers a shocking truth: Max is an alien who has kept his unearthly abilities hidden his entire life, along with those of his otherworldly sister, Isobel, and their friend Michael. Elsewhere, Master Sgt. Jesse Manes spearheads a long-standing government conspiracy—unbeknownst to his son, Alex Manes.

The anniversary of Rosa’s death reignites tensions as the town takes aim at Liz and her father, Auturo, for what happened on that fateful day 10 years ago. Meanwhile, Max confronts Michael and Isobel, who are concerned that his feelings for Liz will expose their secret. Elsewhere, Master Sergeant Manes’ attempt to convince Kyle of the alien conspiracy in Roswell takes an unexpected turn. Finally, Liz and Kyle make a shocking revelation about Rosa’s death.

After uncovering some unsettling information about Max, Liz runs a series of tests to see what his powers may be capable of. Michael and Isobel take matters into their own hands after learning that Liz may be getting too close to Max. Liz enlists Maria’s help as she goes on a scavenger hunt across Roswell to uncover more about Rosa’s final days.

Fearing that his identity will be uncovered, Max is conflicted when a town-wide power outage leaves patients at the hospital in need of help. Meanwhile, Liz turns to Kyle after learning details about the night Rosa died. Elsewhere, Isobel and Michael come up with a plan to deal with Liz, and Master Sargent Manes seeks help from an unlikely source.

Max and Michael begin to worry about Isobel after a series of mysterious blackouts cause her to spiral. Liz turns to Grant Green for help when she learns that he may have witnessed something strange on the night Rosa died. Meanwhile, Kyle and Alex uncover a secret that Kyle’s father had been keeping from everyone.

In a series of flashbacks to 2008, secrets are uncovered about Rosa’s final day, Isobel’s mysterious blackouts and Alex and Michael’s relationship in high school.

After uncovering a devastating secret about Rosa’s death, Liz takes matters into her own hands to protect herself and those around her. However, her plans are sidelined after a day with Mimi, Maria and Alex leads to a new revelation about Rosa. Elsewhere, Max takes aim at Wyatt, while Cameron decides whether she’s going to help Sergeant Manes.

With Isobel’s life hanging in the balance, Liz and Michael frantically search for a way to help her. Max turns to his mom Ann about the origins of the alien symbol. Finally, Alex turns the tables on Sergeant Manes.

Max and Michael travel to Texas to visit a faith healer, who may be able to shed some light on the alien symbol Max has been researching. Meanwhile, Maria and Liz pay a visit to the same faith healer in hopes of finding a cure for Maria’s ailing mother. Elsewhere, Alex and Kyle look into what Sargent Manes may be hiding.

Frustrated by her inability to remember what happened the night Rosa died, Isobel turns to Liz for help regaining her memories. Elsewhere, Max and Cameron investigate a series of strange deaths in the town, while Sheriff Valenti reveals information to Kyle about his father.

As the town prepares for the UFO Emporium Re-opening Gala, Liz and team find themselves on a collision course with an unlikely enemy.

When a major revelation comes to light, Max, Michael and Isobel clash over how to deal with the fallout. Elsewhere, Alex uncovers a secret about Project Shepard and enlists Kyle and Michael’s help looking into it.

Max and Michael find themselves at an impasse over how to deal with the 4th alien. Liz has a dangerous encounter with an unexpected visitor. Kyle spirals after uncovering a dark secret about his father’s death. And Michael is forced to make a difficult decision about his future.

Torn between the heartache of Max's sacrifice and the joy of Rosa's resurrection, Liz suppresses her grief to focus on moving out of Roswell with Rosa. Michael copes with Max's death in his own self-destructive way. Isobel hones her alien powers.

Liz is forced to put her latest experiment on hold after Rosa begins to struggle with her new life in Roswell. Reluctant to face the truth about his mother's past, Michael turns his attention to Maria, who is dealing with her own family crisis.

Determined to regain control of her life in the aftermath of Noah's death, Isobel makes a risky choice despite its potential consequences. Alex and Michael work together to unravel the mystery surrounding the night Nora's spaceship crashed in 1947.

On the verge of a breakthrough in her quest to save Max, Liz turns to Kyle for one last favor that could potentially land him in hot water. Michael and Alex's investigation into Nora leads them to a farm, where they meet a historian named Forrest.

The discovery of some complications with Max's pod forces Liz, Michael and Isobel to confront the possibility that they may not be able to save him. Elsewhere, Maria and Alex make amends.

Maria's investigation into her mother's disappearance leads her and Alex to the home of a mysterious boot maker named Travis. Isobel's night out leads her into the arms of someone unexpected. Liz is dealt a devastating blow.

Liz is forced to revisit a painful part of her past when her mother shows up at the diner unexpectedly. Michael urges Maria to seek help after she experiences a strange vision. Kyle's attempt to get Steph to open up doesn't go as planned.

Despite promising Liz that he’ll take things easy with his new heart, Max sets out to find Cameron after learning that she’s gone missing. Michael grows concerned about Maria after a surprising discovery about her family history leaves her vulnerable. Elsewhere, ready to move on, Alex goes on a date with Forrest, and Rosa makes a decision about her future.

After uncovering a surprising connection to their past, Michael and Isobel learn the painful truth about the night Tripp attacked their mothers. Meanwhile, Alex confronts his father about their troubled family history. Elsewhere, Kyle’s first date with Steph takes an awkward turn after Liz inadvertently becomes a third wheel.

After uncovering a cryptic message from the past, Alex, Isobel, Max, Michael and Maria set out in search of answers at the reservation where Alex’s mother grew up. Meanwhile, Cameron encourages Liz to reach out to someone from her past after Auturo gets detained.

Driven by the prospects of her scientific research, Liz opens up to Diego about all the good her findings could do; Max enlists Kyle's help with the recent abductions; Michael does his own investigating into Alex's disappearance.

As the town prepares for CrashCon, Liz and Max attempt to piece together who may be behind a potentially deadly plan targeting the festival; Maria and Isobel take drastic measure to learn more about the night Mimi disappeared.

Having realized that a deadly threat has infiltrated CrashCon, and with Max facing immediate danger, Liz and Isobel must make a heart-wrenching choice; Kyle faces a moral dilemma when the enemy requires medical attention.

With the threat of Jones behind them, in a peaceful Roswell we find Liz is busy teaching while Max lends an assist to his ex-partner on a string of recent bank robberies. Our couples are happy and thriving but a sudden storm, leaves everyone on edge about what is to come.

A visitor connected to Liz's past comes bearing gifts. Anatsa digs in on a story about the bank heists, angering Max and putting Kyle and Isobel in a difficult position.

Liz, Max, Michael and Cameron put a plan into action that could finally get them a step closer to catching Bonnie and Clyde. Meanwhile, Maria is hiding her recent lack of visions and Kyle has a date.

Liz's work to find out more about a found skin sample hits a roadblock. Meanwhile, Michael continues to gain Bonnie's trust, but Clyde may not be as easily persuaded. Also, Isobel finally finds the courage to be honest with Anatsa and Maria suffers a devastating loss.

Max's secrets may have a devastating outcome for Liz meanwhile, Maria helps Dallas in his search for answers and Michael makes an unsettling discovery about himself.

Liz turns to Shivani for help finding scientific answers while Bonnie looks to Max for protection. Meanwhile, Kyle and Isobel deal with the fallout of their actions.

Liz and Max have a major disagreement prompting her to turn to Rosa for guidance and Maria struggles to connect to her mother's spirit.

With missing friends and mysteries abound, Liz returns to fringe science, but in working alongside her new mentor, she's confronted with an unsettling revelation and a difficult choice, meanwhile, Maria uncovers the truth behind the "messages" she's been receiving.

After being exposed to her own "alien-power mist," Liz finds herself trapped in a fever dream and a battle to save not just her own life but Max's life as well. Meanwhile, Michael stumbles on a secret Rosa is keeping involving a surprising former adversary.

Max and Rosa begin to uncover what Liz has been hiding, leading her to make a rash decision. Meanwhile, Michael and Maria struggle as their trail to locating their missing friends runs cold.

As Liz begins to see the error of her ways, she is quickly faced with a new threat which forces her to make a difficult decision. Meanwhile, Max finds himself in an intense standoff and Michael begins to lose hope of ever reuniting with Alex.

Liz is faced with an impossible decision, meanwhile Max agrees to join Isobel on a mission to save Bonnie.

Liz, doubting her abilities, calls for reinforcements, meanwhile Isobel shows Max a memory, one that will put him on a new trajectory and Michael makes a promise to Alex.