Zeke spends Halloween in his true alien form, but when a jealous classmate decides to stop him from winning the school costume contest, Harris and Roxy must save the day.
Harris and Roxy visit Zeke's house after school, then Harris's parents invite Zeke's family to dinner, but trying to convince anyone that they are aliens only gets Harris grounded.
Harris invites Zeke to join him for a weekend at Beaver Scout Camp, but Zeke needs help understanding the activities and hiding his alien abilities from the other campers.