Roswell Season 1 Episode 17 - Crazy: Isabell makes 老友记 with a new girl at school named Tess just as Mrs. Topolsky returns with a warning that an alien hunter is tracking down Max.
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 face off between Max and Michael over leadership
Michael and Maria flee from Roswell after helping Laurie DuPree escape from the police, and Max learns that a deadly parasite was released into Earth's atmosphere when their ship crashed 50 years ago.