The teens' challenge is for each to spend three days and nights alone in the wilderness, which proves especially hard for Derek, who dreads being by himself. Those who complete the task receive their own Earth names. Also: Lexie bonds with Glacier; Jada tries to persuade her parents to bring her home early.

• Arnold Shapiro
• Michelle Brando
• Sean Sheridan

• Clayton Halsey
• Frank Hewitt
• Lauren James