Tom Clarke (Ryan Hurst) and John (Eric Close) are the only characters to appear in both this installment and the first, "Beyond the Sky".

Of the twenty five actors listed in the opening credits throughout the series, Dakota Fanning (Allie Keys) is the only one whose name appears in the opening credits of all ten episodes.

Besides Dakota Fanning who narrated all ten episodes and appeared in the last four, Matt Frewer (Dr. Chet Wakeman) appeared in the most episodes, six in total: "Maintenance", "Charlie and Lisa", "God's Equation", "Dropping the Dishes", "John" and "Taken".