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.

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.

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.

Liz makes the choice to lie to Heath. Maria and Rosa stand up to Jordan. Isobel does some digging into Jones.

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.

While Liz is settling in to her new life and career in Los Angeles, Max , Isobel and Michael are figuring out if the stranger in the cave, with the familiar face, is friend or foe.

Jones fills Michael and Isobel in on bits from the past as they look for a way to save Max’s life. Meanwhile, Maria goes to extremes to try and stop a murder, and in order to move forward in her research, Liz will have to face her past.

Liz and Max continue to search for a way to stop Jones. Michael is worried about Alex and elsewhere, Isobel finds a big piece of the puzzle.

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 investigates the break-in meanwhile, Alex continues his research. Rosa and Isobel team up and Liz makes a shocking discovery.

A desperate Liz agrees to a deal. Meanwhile, Rosa helps Isobel make a big discovery and the fight to save Max begins.

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.

Liz needs Rosa's help. Maria learns what Jones wants from her. Michael and Alex team up to help save Max.

Liz confronts Max. Maria is desperate to figure out the mystery of her vision and Isobel is learning more about her abilities. Meanwhile, Kyle has a strange encounter and Michael is fueled by his anger.

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.

Isobel and Maria take a trip together to look for answers. Kyle receives a message from his past. Michael makes a disturbing discovery.

Liz's plan does not go as expected, putting herself, Isobel and Michael in danger. Meanwhile, Eduardo confides in Alex.