Roswell is an American science fiction television series developed, produced, and co-written by Jason Katims. The series debuted on October 6, 1999, on the WB and later shifted to UPN for the third season. The final episode aired on May 14, 2002. Sixty-one episodes in total were broadcast over the show's three seasons. In the United Kingdom, the show aired as both Roswell High and Roswell. The series is based on the Roswell High young adult book series, written by Melinda Metz and edited by Laura J. Burns, who later became staff writers for the television series. A reimagining of the series, titled Roswell, New Mexico was ordered to series on May 11, 2018, and premiered on January 15, 2019, on The CW. Cast Main Shiri Appleby as Liz Parker: A teenage girl who learns the aliens' secret after Max saves her life. The two develop a relationship afterward. Jason Behr as Max Evans: Leader of the Royal Four with the power to heal. Throughout the series, Max struggles with his relationship with Liz, his mysterious alien past, and finding his place as a leader. Brendan Fehr as Michael Guerin: Max's best friend. Michael is an alien who struggles to find his place on earth. He has a relationship with Maria. His special power is never revealed and he has the most trouble controlling himself, especially when his emotions are strong. Katherine Heigl as Isabel Evans: Max's sister who struggles to fit in carrying the secret of her alien existence. Isabel has the power to "dream-walk", or enter people's minds during their dreams or her own. Majandra Delfino as Maria DeLuca: Liz's best friend who is in on the secret. She is in a relationship with Michael and struggles with it. Colin Hanks as Alex Whitman: Liz and Maria's best friend who helps them on their adventures and has a crush on Isabel Nick Wechsler as Kyle Valenti: Jim's son who has suspicions about Max, but eventually becomes a friend William Sadler as Sheriff Jim Valenti: The town sheriff who starts out as an enemy but becomes a powerful ally Emilie de Ravin as Tess Harding: The "fourth" alien who was raised by Nasedo. Tess has the power to "mind-warp," or cause people to see things that are not really happening. Adam Rodriguez as Jesse Ramirez Recurring Garrett M. Brown as Philip Evans: Max and Isabel's adoptive father Mary Ellen