Terry surprises the kids with a trip to the happiest place in the galaxy — until a heartbreaking sight upsets them and puts the family at odds.

Terry and the kids race through space to make it home before Mom does. Back on Earth, Lisa and Sean learn the truth, and an unwanted visitor appears.

When Terry goes missing, Tess leaves Lisa and Sean at home with grandma to rescue him alone... unless the kids can find their own way into space.

After the EHC returns precious cargo to the Doloraami Empire, a marvelous family reunion is interrupted by a fight — to the death.