Liz's grandmother is rushed to the hospital after suffering a stroke prompting Liz to reach out to Max for comfort.

Liz discovers her personal journal, which contains all she knows about the aliens, is missing and she fears it has fallen into the hands of someone who could expose the aliens.

Michael's monomaniacal urge to find the geodesic dome that's been stalking his dreams leads him to hijack Maria's car to Texas.

Max is injured in a car accident and Liz pressures Alex to help protect him from medical procedures that could expose his identity by providing blood samples to replace Max's.

A freak December heat wave hits the town and sparks romance as Michael's relationship with Maria heats up and Liz's infatuation with Max intensifies; meanwhile Isabel enters into one of Alex's dreams only to discover her likeness already there and dancing with Alex.

While at the reservation Michael ends up in an alarming hallucinatory state and the others must band together to save his life.

When Max rescues his mother from a kitchen fire she faces her suspicions about his extraordinary abilities; Liz reaches out to Kyle in friendship.

A new UFO sighting sends suspicion and fear through the town and leads Max and Isabel to investigate the incident during a school camping trip.

Maria enters Liz in a blind date contest; Max and Kyle commiserate about their shared feelings for Liz; Michael and Isabel send a signal to the fourth alien.

After Michael has a violent showdown with his father, Max and Isabel's father helps Michael set up his emancipation; the fourth alien emerges as a shapeshifter who watches over Max, Michael and Isabel.

Liz is unnerved by her strong desire for Max and the visions that come when they kiss - visions that lead to a glowing orb in the desert.

FBI agent Topolsky returns to warn Liz that a covert alien hunter inside the Bureau is pursuing Max and his friends -- and that he will stop at nothing to get what he wants. Meanwhile, Isabel befriends Tess, a new female student who immediately arouses Max and Michael's suspicions.

Max develops an uncontrollable attraction to Tess that includes intense sexual daydreams, and Sheriff Valenti learns that Topolsky was killed in a suspicious fire. Meanwhile, someone has secretly placed a video camera inside Michael's apartment.

Tess's book suggests that she and Max are predetermined mates, as are Michael and Isabel, who thinks she might be pregnant -- with Michael's baby. Meanwhile, Nasedo disguises himself as Max and kidnaps Liz as part of a plan to trap FBI agent Pierce.

Max finds himself in a white room with no windows or doors, facing questions by Agent Pierce. Isabel telepathically contacts Max, who leaves her clues to his location. Michael, Isabel and Tess then set out on a rescue mission.

After escaping from Pierce, the aliens save Nasedo. Michael accidentally kills Pierce. Nasedo, as the aliens' guardian takes Pierce's place to help the aliens. The aliens figure out how to use the devices and release a message from Max and Isabel's real mother. She says Max is their leader and Tess, his fiance and that Michael is Second in command and he is Isabel's fiance. After hearing all this Liz runs out.

Isabel is deeply moved when Max throws her a surprise birthday party, but she grows troubled after seeing visions of a bound and gagged Tess. Alex does an interesting cop striptease for Isabel.

An older Max travels from the future (2014 to be exact) to tell Liz that their relationship will imperil his planet and together they devise a plan to change the future: by making present Max fall out of love with Liz.

The Skins make all the humans in Roswell, New Mexico disappear turning it into a ghost town.

Duplicate versions of Michael, Isabel and Tess come to Roswell after killing their king Zan, to urge Max to attend an important interstellar summit in New York City, but they have their own agenda; Ava stays behind in Roswell.

Max witnesses a tragedy and is haunted by the ghost of a man he could have saved, leaving him overwhelmed with guilt and questioning his healing abilities. Isabel aka the Christmas Nazi (dubbed by Michael) tries to brighten up the holiday season and Tess tries to became a part of the Valenti family.

When Isabel develops a psychic connection to a girl who has been buried alive, she races to find the teenager before it's too late. Meanwhile the FBI comes to town and starts asking questions concerning Valenti and his involvement with Max and Isabel.

When the gang makes a spur-of-the-moment trip to Las Vegas, in order to spend the DuPree money, the event-filled excursion ends in a faceoff between Max and Michael over leadership; Tess and Liz can't pass for over-21-year-olds; Maria recruits Alex to help her audition for a role that ends up to be for a stripper; Isabel meets a man.

The sudden death of a close friend shocks the group.

Max is hit with a one-two punch after he discovers that not only is Tess pregnant with his son, but that the baby cannot survive unless they return to their home planet. Liz, Maria and Michael work together to unravel the mysterious double life of Alex. Isabel and Kyle explore her powers as they play pranks on Max and Kyle dreamwalks with a Playmate.