“Skin and Bones” – 2ADA01 – October 2, 2000

A geologist finds the buried bones of Agent Pierce and brings them to Sheriff Valenti. The lawman then tries to cover up the case, but encounters interference from an eager Deputy Hanson. Meanwhile, Nasedo, who is disguised as Agent Pierce, discredits the Special Unit during televised Congressional hearings.
Part 1 of 2.

“Ask Not” – 2ADA02 – October 9, 2000

Max struggles with his new role as the sole leader of the alien quartet. Michael aggravates the situation by questioning Max's plan, which calls for them to "try to blend in." Meanwhile, Kyle returns home from football camp with a new attitude, and Max discovers that Milton has left the UFO Center.
Part 2 of 2.

“Surprise” – 2ADA03 – October 16, 2000

Isabel's friends throw her a surprise birthday party at the Crashdown Cafe, but a mysterious headache and hallucinations of Tess in jeopardy grip the alien teen during the festivities. Meanwhile, Liz discovers that Congresswoman Whitaker has been recording Liz's personal phone calls at work.

“The End of the World” – 2ADA05 – October 30, 2000

Max travels back in time from the year 2014 to the present to warn Liz that their personal relationship will result in Earth's conquest by alien forces. Meanwhile, Michael begins to suspect that Courtney is not who she appears to be.

“Wipeout!” – 2ADA07 – November 13, 2000

Most of the residents of Roswell disappear after a green pulse from the sky descends on the town, leaving only the alien quartet, Courtney, Liz, Maria and the Valentis behind to solve the mystery. The situation gets worse after Liz finds evidence of a Skin in the area.

“Meet the Dupes” – 2ADA08 – November 20, 2000

After murdering their leader, aliens resembling Michael, Isabel and Tess travel to Roswell from New York to persuade Max to attend a summit with leaders from other planets. Elsewhere, Brody is attracted to Maria, whom Michael begins to take for granted.
Part 1 of 2.

“Max in the City” – 2ADA09 – November 27, 2000

Max and Tess travel to New York City, where Rath takes Max to meet an enigmatic individual called the Emissary, who tests Max's claim to the throne. Elsewhere, Maria tells Liz about a rumor going around school that Liz slept with Kyle.
Part 2 of 2.

“A Roswell Christmas Carol” – 2ADA11– December 18, 2000

Max is haunted by the ghost of a man killed in a car accident - a man he could have saved, but didn't for fear of being exposed. Michael ponders what to get Maria for Christmas. Elsewhere, Maria discovers that Brody has a 5-year-old daughter with cancer; Isabel is overburdened with Christmas activities; and Tess learns that the Valentis are none too festive about the holiday season.

“To Serve and Protect” – 2ADA10– January 22, 2001

Isabel suffers from nightmares depicting a girl bound, locked in a trunk and screaming for help. Sheriff Valenti is questioned about the year-old shooting of Everett Hubble. Elsewhere, Maria's cousin Sean arrives in town, fresh from a prison stint.

“We Are Family” – 2ADA12 – January 29, 2001

A judge suspends Sheriff Valenti for his actions during the investigation of a missing girl. Valenti's authority is then partially restored by an FBI agent who requires his assistance with the same case. Meanwhile, Michael finds evidence related to the disappearance that may be extraterrestrial in origin.

“Disturbing Behavior” – 2ADA13 – February 5, 2001

Laurie (Allison Lange) escapes from an ambulance on her way to a mental facility and unwillingly joins Michael and Maria, who were following her and witnessed her getaway. Meanwhile, Isabel is questioned by Agent Duff about her involvement in Laurie's case.

“How the Other Half Lives” – 2ADA14 – February 19, 2001

Maria and Michael learn that Laurie is the heir to her family's estate, which may be the reason her aunt and uncle want her to believe that she is mentally ill. Meanwhile, Kyle and Alex discover a cave full of alien crystals - that turns into a trap when the crystals seal them in.

“Viva Las Vegas” – 2ADA15 – February 26, 2001

Michael's nerves are shot, so he decides that he and Max should take a trip to Las Vegas to blow off steam. Isabel and Maria discover the boys' plan and invite themselves to go along. Then Tess, Kyle, Liz and Alex hear the news and join the road trip.

“Heart of Mine” – 2ADA17 – April 16, 2001

Max and Liz agree to go to the prom together as friends, while Michael tells Maria that the festive event is "totally bogus." Isabel considers asking Alex to the dance and Kyle sets his sights on taking Tess.

“Cry Your Name” – 2ADA18 – April 23, 2001

Jim Valenti breaks the news to the aliens and their friends that Alex was killed in a car accident. Max attempts to revive the teen, but his efforts fail. The group is then forced to deal with the loss of their friend. Maria and Isabel respond emotionally, but Liz remains oddly stoic.

“It's Too Late and It's Too Bad” – 2ADA19 – April 30, 2001

Liz continues her investigation into Alex's death and she enlists Sean's help in breaking into the school guidance counselor's office, where she makes a photocopy of Alex's personal file. Meanwhile, Isabel tells Max that she received a letter from a college that she hopes to attend in the fall.

“Baby, It's You” – 2ADA20 – May 7, 2001

Max and Tess disclose the new level of their relationship to their friends, but it's the alien leader who gets the real surprise when he learns that Tess is pregnant---with his child. Meanwhile, Maria discovers that Alex never left New Mexico for his alleged trip to Sweden. Pop singer Nelly Furtado and centerfold Jodi Ann Paterson appear as themselves.

“Off the Menu” – 2ADA16 – May 14, 2001

An electrical shock knocks out power throughout Roswell, causing Brody to recall his alien abductions. The frantic man then takes Max, Tess, Maria and her family hostage at the UFO Center. Michael and Isabel come looking for Max...and stumble into the crisis.

“The Departure” – 2ADA21 – May 21, 2001

The second season ends as the aliens prepare the Granilith for the journey to their home planet. Max and his pals are left with only 24 hours to say their goodbyes to their families and friends in a series of emotional encounters.