The scene in which the two priests meet with Colonel Wilder was filmed at one of the ancient temples on Malta.
An 11-year-old Laurie Holden, stepdaughter of Michael Anderson (director of the series), appears as Marie Wilder, the young daughter of Colonel John Wilder (Rock Hudson).
At the cinema in First Town, the film being shown is The Silver Locusts. This is the original title of the Ray Bradbury novel, The Martian Chronicles.
This episode takes place in February 2004 and September 2006.