The aliens realize that they are no longer safe in Roswell and make plans to leave after graduation.
Tess returns from Antar with Max’s son and with the Air Force hot on their trail.
Michael saves a pilot from being killed by the Air Force to cover up his collision with a UFO.
Max and Michael contend for leadership of the aliens, while the FBI recruits Jesse to spy on them.
Isabel fights for her life after being shot, while Max and Clayton Wheeler struggle for control of one body.
Maria and Liz leave Roswell to pursue their dreams, while Michael enlists the help of his friends in investigating the murder of his coworker.
Liz begins to suffer ill effects from being healed by Max, while Maria gets the opportunity to pursue a career in music.
An old reporter friend of Jesse’s comes to visit and begins to suspect that Jesse married an alien.
On New Year’s Eve, most of the gang searches for a secret party in the desert, while Liz stays at the Crashdown to host a party for senior citizens.
When an autistic boy speaks to Max, he befriends the boy in the hope that his own child is using him to communicate.
Maria’s old boyfriend comes to town and rekindles her interest in music and a normal life.
Isabel and Jesse have their honeymoon interrupted by Kivar, who attempts to take her back to their home planet.
Isabel and Jesse get married, despite interference from all corners, including Isabel’s former lover from her home planet.
Max discovers that his shape-shifting former guardian is a Hollywood producer, who grudgingly helps him search for his spaceship.
Max goes to Los Angeles in search of a shape-shifter who may hold the key to finding his son.
Isabel and Jesse take their relationship to the next level when they contemplate marriage.
Alien teenagers try to keep their true identity a secret, as well as deal with everyday high school issues, in Roswell, New Mexico.
"I'm Liz Parker and five days ago I died. After that, things got really weird." So begins a new life for Liz and her friend Maria after they discover that three of their classmates at Roswell High aren't exactly from "around here".
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