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.
Casts:
Shiri Appleby, Jason Behr, Katherine Heigl, Majandra Delfino, Brendan Fehr, Nick Wechsler, Adam Rodriguez, William Sadler